Why must both underhooks be dug simultaneously rather than one arm at a time?

Reaching one arm at a time leaves the slow side exposed for the opponent to insert a knee shield or re-pummel a foot inside, which blocks the second underhook and stuffs the entry. A single explosive scoop with both forearms penetrating together denies that framing window and ensures neither side is left open during the most vulnerable moment of the commitment.

What is the correct order of operations between stacking the hips and clasping the hands?

Stack first, clasp second. You must elevate the opponent's hips and drive their knees toward their shoulders to compromise their frames and mobility before you lock your grip. Clasping first traps an opponent who still has framing and shrimping options, allowing them to recover guard despite the grip. The stack is what makes the locked control meaningful.

How deep should the underhooks be, and why does depth matter?

The forearms must penetrate fully under the thighs so your shoulders end up beneath the opponent's hamstrings, not merely under the knees. Shallow control under the knees lets the opponent separate their legs and prevents the stack from consolidating. Deep underhooks under the thighs turn both legs into a single controllable unit and make the stacking pressure effective.

Since committing both arms removes your ability to post, what keeps your back safe during this entry?

Your head position, chest pressure, and wide base replace the missing post. Driving your head into the opponent's chest or near hip blocks their rotation toward your back, dropping chest weight onto the thighs consolidates the stack, and a wide base on the balls of your feet lets you ride a bridge or lateral roll without being turned over. Without these, the committed posture invites back-takes and reversals.

When the opponent inserts a strong knee shield before you complete both underhooks, what is the better adjustment than forcing the symmetric entry?

Stop fighting to force both arms in against the established frame and instead commit to the single underhook you already secured, transitioning to a leg-weave or over-under control on the framing side. Chasing both legs against a knee shield only creates space and stalls; redirecting to a one-side pressure control keeps your advantage and avoids resetting to neutral.

Open Guard to Double Unders Attacker | BJJ Technique Guide

As the attacker entering Double Unders from Open Guard, your objective is to convert a neutral open-guard exchange into a crushing bilateral-underhook stack before the defender can re-establish frames. The technique is a commitment pass: you thread both arms under the opponent’s thighs, drive their knees toward their own shoulders, and clasp your hands behind their lower back so their legs and hips become a single controlled unit.

The entry succeeds on timing and pressure rather than strength. You wait until the opponent’s hips are light or their guard opens, dig both underhooks in one motion, and immediately stack their weight onto their shoulders so they cannot frame or insert a knee shield. Once the stack is set and your hands are clasped, you have entered the Double Unders control, from which the Double Under Pass to side control, a back-take when they turn, or a mount transition all become available.

Because committing both arms under the legs removes your ability to post, your head position, chest pressure, and wide base are what keep you safe. A clean entry leaves the defender stacked and exhausted; a sloppy one invites deep half entries, back exposure, and reversals. Drill the entry as a single explosive scoop-and-stack rather than a slow two-handed reach.

From Position: Open Guard (Top)

Key Attacking Principles

What are the key principles for executing Open Guard to Double Unders?

Dig both underhooks simultaneously in one motion - a staggered, one-arm-at-a-time reach lets the opponent frame on the slow side
Drive the opponent’s knees toward their own shoulders to stack their weight before clasping, killing frames and hip mobility
Clasp the hands behind the lower back (gable or S-grip) or grip the belt so both legs become a single controlled unit
Keep your head pressuring into the chest or hip so the committed posture does not expose your back
Maintain a wide, mobile base on the toes so you can ride bridges and resist being rolled during the commitment
Time the entry to the moment the hips are light or the guard opens, never against deeply pinning feet
Treat the control, not the pass, as the goal of this entry - secure the stack first, advance second

Prerequisites

What do you need before attempting Open Guard to Double Unders?

Passing posture facing the open guard with the opponent’s legs presented in front of you
Opponent’s feet cleared off your hips or pinned long enough to dig under the thighs
Both forearms able to slide fully under the opponent’s thighs, not just under the knees
Chest and head positioned to immediately stack the opponent onto their shoulders once arms are in
Wide base with knees and feet set to drive forward and absorb a bridge or reversal attempt

Execution Steps

How do you execute Open Guard to Double Unders step by step?

Clear the feet and close distance: From your open-guard passing posture, control or strip the opponent’s feet off your hips with downward grips or a quick pummel, then step or shuffle your hips forward to close the distance to their thighs. You must remove their primary framing tools before committing your arms, otherwise the underhooks will be blocked by a foot or knee shield.
Scoop both arms under the thighs: In a single explosive motion, drive both forearms underneath the opponent’s thighs, not merely under the knees, so your shoulders end up beneath their hamstrings. Reaching only under the knees leaves a shallow control they can easily separate. Both arms must penetrate together so neither side stays exposed for a frame or knee-shield insertion.
Elevate and stack the hips: Straighten your legs slightly and lift with your shoulders to elevate the opponent’s hips off the mat, driving their knees back toward their own shoulders. This stacking action rolls their weight onto their upper back and neutralizes any attempt to shrimp, frame, or insert a butterfly hook between your arms.
Clasp the hands behind the back: With the hips stacked and elevated, bring your hands together behind the opponent’s lower back using a gable grip or S-grip, or grip the belt or waistband. This connection turns both legs and the hips into a single unit, locking the double-underhook control. Keep your elbows pinched to your ribs so they cannot wedge their arms in to break the grip.
Bring head and chest into the stack: Drop your chest heavily onto the backs of the opponent’s thighs and place your head against their chest or driven into their near hip. This forward pressure consolidates the stack, prevents them from rotating to escape, and protects your back from exposure now that both of your arms are committed underneath them.
Settle the base and confirm the control: Widen your knees and come onto the balls of your feet so you can ride a bridge or lateral roll without losing the grip. Confirm you are in the Double Unders control: hands clasped behind the back, hips stacked, chest pressuring the thighs, head blocking rotation. From here you transition to the Double Under Pass, a back-take, or a mount entry depending on their reaction.

Possible Outcomes

Result	Position	Probability
Success	Double Unders	60%
Failure	Open Guard	28%
Counter	Open Guard	12%

Opponent Counters

How might your opponent counter Open Guard to Double Unders?

Opponent inserts a knee shield or re-pummels a foot inside before you dig the second underhook (Effectiveness: High) - Your Response: Abandon the symmetric entry and commit to the single underhook you secured, switching to a leg-weave or over-under control on the framing side rather than fighting to force both arms in against an established frame. → Leads to Open Guard
Opponent dives underneath your committed posture to enter deep half guard (Effectiveness: Medium) - Your Response: Keep your hips low and connected, sprawl your weight back onto their hips, and switch your head to the opposite side to block the rotation before they get their head below your hip line. → Leads to Open Guard
Opponent uses your committed arms to bridge and roll you, exposing your back (Effectiveness: Medium) - Your Response: Widen your base immediately, post your head into the mat or their chest to anchor, and ride the bridge by staying heavy rather than resisting upright, then re-settle the stack once their momentum stalls. → Leads to Open Guard

Common Attacking Mistakes

What mistakes should you avoid when executing Open Guard to Double Unders?

1. Reaching under one leg at a time instead of digging both underhooks together

Consequence: The opponent frames or inserts a knee shield on the slow side, blocking the second underhook and stuffing the entry entirely
Correction: Treat the scoop as a single explosive motion driving both forearms under the thighs simultaneously so neither side is left exposed

2. Securing the underhooks only under the knees rather than the thighs

Consequence: The control is shallow, the opponent easily separates the legs, and the stack never consolidates
Correction: Drive your shoulders under their hamstrings so your forearms are deep beneath the thighs before you clasp

3. Clasping the hands before stacking the hips

Consequence: You lock a grip on an opponent who still has frames and mobility, allowing them to shrimp out or recover guard despite the grip
Correction: Elevate and stack the hips onto their shoulders first, then clasp the hands once their weight is already compromised

4. Letting the elbows flare wide while clasping

Consequence: The opponent wedges a forearm into the gap, breaks the connection, and pummels back to open guard
Correction: Pinch both elbows tight to your ribs throughout, treating the two arms as a single closed loop around the legs

5. Committing both arms without bringing the head and chest into the stack

Consequence: Your back is exposed and the opponent can turn to take it or bridge and roll you over your committed posture
Correction: Immediately drop chest pressure onto the thighs and drive your head into their chest or hip to anchor and protect against rotation

Training Progressions

How do you train Open Guard to Double Unders (Attacker)?

Week 1-2: Underhook Penetration Mechanics - Digging both underhooks under the thighs simultaneously With a compliant partner in a static open guard, drill clearing the feet and scooping both arms deep under the thighs in one motion. No stacking or grip yet - focus purely on penetration depth and getting shoulders under the hamstrings. 20-30 repetitions per session alternating which side you initiate from.

Week 3-4: Stack and Clasp Sequence - Elevating the hips and locking the grip Partner provides light resistance. Practice the full scoop, stack the hips onto their shoulders, then clasp behind the back and bring head and chest into the stack. Emphasize the order - stack before clasp - and keeping elbows pinched. 15-20 repetitions per session.

Week 5-8: Reactive Entry Against Frames - Timing the entry and handling defensive frames Partner actively works knee shields, foot frames, and re-pummels at 50-60% resistance. Practice reading when the hips are light, committing the entry, and bailing to single-underhook leg-weave control when the symmetric entry is denied. 10-15 entries per session with feedback on timing.

Month 3+: Live Open-Guard Passing - Entering Double Unders in full positional sparring Start in neutral open guard with full resistance. The passer works to create the moment, commit the double-underhook entry, and consolidate the stack while protecting against deep half and back exposure. 5-minute rounds with role resets when the control is established or the guard is recovered.

Safety Considerations

What are the safety concerns for Open Guard to Double Unders?

This entry stacks the opponent’s weight onto their head, neck, and upper back, so apply elevation and pressure progressively rather than slamming the hips overhead - sudden or forced stacking can compress the cervical spine. The defender should always have room to roll or tap, and partners must communicate during heavy stacking drills. The passer’s committed arms also create scramble and rolling situations, so train on adequate mat space and control the speed of any bridge or roll to protect both practitioners’ necks and shoulders.