Single-leg X-guard, often shortened to SLX or referred to as ashi garami in leg-lock terminology, is an open-guard position in which the bottom player isolates and controls one of the opponent's legs using their own two legs in a triangular configuration. The position is one of the most important in modern jiu-jitsu because it functions simultaneously as a sweep platform and as the primary entry to high-percentage leg locks.
How it works (mechanics)
In single-leg X, the bottom player traps one of the opponent's legs between their thighs while controlling the foot or ankle with their hands. One of the bottom player's legs hooks behind the opponent's knee while the other foot presses against the hip. This three-point control system isolates the trapped leg from the opponent's body and prevents them from posting or stepping to recover base.
The position works because it attacks the opponent's base at the closest possible range. By controlling one leg completely, the bottom player can sweep the opponent in nearly any direction simply by extending or rotating the controlled limb. The opponent's standing leg becomes the only support, and a small disruption to that single point of contact collapses the entire structure.
The second mechanical role of SLX is leg-lock entry. Because the trapped leg is already isolated and the knee is exposed, the position transitions seamlessly into outside heel hook attacks, ashi garami leg entanglements, kneebars, and toe holds. In modern no-gi competition, single-leg X is often considered the most important guard position because it combines high-percentage sweeps with high-percentage submissions in a single structure.
When to use it (setups)
Single-leg X is most accessible from butterfly guard, from de la Riva, and from any position where the bottom player can underhook one of the opponent's legs. It also appears naturally when an opponent stands to begin a guard pass, because standing exposes the legs to the entry. The transition from de la Riva to SLX is one of the most common and high-percentage sequences in modern competitive jiu-jitsu.
It is especially powerful in no-gi, where leg locks are unrestricted at higher belts and the absence of friction makes the sweeps more dynamic. In the gi, the position is still effective for sweeps but the leg-lock threat is reduced under IBJJF rules, which limits some attacks. SLX is also a strong response to wrestling-style stance and base, because the entry does not require gi grips.
Common errors
- Letting the inside hook slip out from behind the opponent's knee, which collapses the triangular control structure.
- Holding the foot or ankle without elevating, allowing the opponent to base out and pull their leg free.
- Pressing against the hip too high or too low, missing the leverage point needed to break the opponent's base.
- Committing to a sweep direction without first reading the opponent's base, which lets them post and counter.
Variations
The standard single-leg X, the cross ashi or inside sankaku, the outside ashi garami, the 50/50 or saddle, and the X-guard itself are all related positions in the modern ashi garami family. Each isolates the opponent's leg differently and exposes different submissions and sweeps. The transition between these positions is one of the central skills of modern no-gi grappling, and elite competitors flow between them seamlessly based on the opponent's defensive reaction.
Who's known for it
Marcelo Garcia built the modern X-guard and single-leg X systems and used them to win multiple ADCC and world championships at multiple weight classes above his own. John Danaher and the Danaher Death Squad, including Gordon Ryan, Garry Tonon, and Craig Jones, integrated single-leg X into the broader modern leg-lock game and made it a primary submission entry. Lachlan Giles has also become known for technical instruction on the position and its transitions.