Purpose

The Russian tie (two-on-one) is one of the highest-percentage entries to back exposure in no-gi. The duck-under is the most direct route — the controlled arm is already isolated, so the only mechanical work remaining is the level change and the rotation under the partner’s shoulder. (inside position) and the underhook controls the hip (underhook controls the hip) both apply: the Russian tie is an extreme inside-hand wins and the duck-under converts that win into hip control on the back side.

This drill trains the entry sequence under semi-resistance — the partner can pull the controlled arm, post on the attacker’s head, or step to defend, but does not counter-attack.

Setup

The attacker has a Russian tie on the partner’s left arm (both of attacker’s hands on the partner’s left arm; one hand at the wrist, one at the elbow or upper arm). Bodies are at angle, with the attacker’s head outside the partner’s left shoulder. Partner is in fighting stance.

Execution

Step 1 — load the level change: Without releasing the Russian tie, the attacker drops their level — hips down, knees bent, torso vertical. The Russian tie is now pulling the partner’s left arm slightly downward, exposing the underside of the partner’s left shoulder.

Step 2 — duck the head under: The attacker rotates their head and shoulders under the partner’s left arm. The path is across the attacker’s own body and under the partner’s armpit. The attacker’s left shoulder leads; the head follows. The Russian tie grip is maintained throughout — at no point is the controlled arm released.

Step 3 — rotate to the back side: As the attacker’s head clears the partner’s armpit, the attacker pivots their body to face the partner’s back. The far hand (originally at the wrist) releases and reaches for an underhook on the partner’s right side or for the seatbelt. The near hand (originally at the elbow) follows, controlling the partner’s left side from behind.

Step 4 — establish back exposure: The attacker arrives chest-to-back behind the partner. Both hands work toward seatbelt or body lock. The drill ends here — no hooks, no submissions.

Partner’s resistance: Partner may pull the controlled arm hard, post a hand on the attacker’s head, or step to widen the angle. Partner may not counter-attack with their own duck-under, throw, or shot.

Run twelve reps, six on each side.

Coaching Notes

The level change is what makes the entry possible. Practitioners who try to duck under at standing height get caught on the partner’s shoulder and stand back up frustrated. The level change drops the head below the partner’s shoulder line, which is the geometric requirement for the path.

The Russian tie must not release. The single most common failure is releasing one hand of the tie to “make space” for the duck-under. Once one hand of the tie is released, the partner can pull their arm free and the attacker is left with no controlling grip in a vulnerable bent-over posture. The grip stays; the body moves around it.

The corner exit — pivoting to face the partner’s back as the head clears — is the rep that takes practice. New practitioners arrive on the partner’s side rather than behind them. The cue is “your chest finds their spine.” If the chest is on the partner’s side ribs at the end of the rep, the rotation was incomplete.

Common Errors

Releasing the tie: As above. The most common failure mode. Maintain the grip throughout.

Standing-tall duck-under: No level change. The path under the partner’s shoulder is blocked by the partner’s body. Drop the level first.

Stopping at the side: The pivot to back is incomplete. Practitioners arrive perpendicular to the partner instead of behind them. Continue the rotation until chest meets back.

Slow rotation: A duck-under that stalls mid-rotation gives the partner time to step out and reset. The rotation is continuous — once the head clears, the body follows immediately.