Single Leg X

Last updated: June 9, 2026

What is single leg X guard?

Single leg X guard, often shortened to SLX, is a bottom position where one of the opponent’s legs gets wrapped up and controlled by both of the guard player’s legs. One foot sits on the opponent’s hip, and the other shin presses against the inside of the same thigh. The opponent’s leg ends up trapped against the guard player’s body, isolated from the rest of their base.

The name comes from the X-guard family. In a full X-guard, the bottom grappler splits the opponent’s legs and controls their base from below. Single leg X narrows that idea down to one leg. Less of the opponent is controlled, but the control on that single leg is tighter and harder to shake.

That trade matters because of what the position threatens. By owning one leg completely, the guard player can off-balance a standing opponent for a sweep or attack the trapped leg with foot locks. The position carries real pedigree in competition. Marcelo Garcia built much of his guard game around X-guard and single leg X, and gi specialists such as Lucas Lepri and Leandro Lo adapted versions of it against the best in the world.

How the position works

The whole position is built on isolating one limb and bringing the guard player’s full body to bear against it. With both legs committed to a single leg of the opponent, the structure becomes difficult to pass and awkward to defend.

Two reference points define it. The foot on the hip is a frame that manages distance and keeps the opponent from closing space. The inside leg, hooked around the trapped leg, locks everything together so the leg cannot slip free.

From there, the position points in two directions at once. Pressure into the trapped leg threatens the opponent’s balance, which opens sweeps toward open space. The same control feeds straight into leg attacks. A spectator watching commentary will usually hear single leg X mentioned right before a sweep attempt or a scramble for an ankle lock.

Single leg X guard vs X guard

The two positions sit in the same family and flow back and forth, which is exactly why they get confused. The difference is how many of the opponent’s legs are under control.

Feature	Single leg X guard	X guard
Legs controlled	One leg, trapped by both legs	Both legs, split apart
Primary threat	Leg locks and off-balancing sweeps	Sweeps and elevation
Control style	Tight isolation of one limb	Wider control of the base
Common follow-up	Ankle lock, heel hook, technical stand-up	Technical stand-up, transition to single leg X

In practice, grapplers move between the two constantly. A guard player often enters X-guard to sweep, then drops to single leg X when the opponent defends, or starts in single leg X and builds up to full X-guard. They are siblings, not rivals.

Single leg X guard and leg locks

Single leg X is closely tied to a Japanese term that shows up constantly in modern grappling: ashi garami, which translates roughly to “leg entanglement.” Ashi garami describes the broad category of positions that trap and control a leg for foot locks, and single leg X is one of the most recognisable members of that family. Commentators sometimes use the two terms loosely, though ashi garami is the wider umbrella, and single leg X is one specific configuration under it.

This connection is why the position became so prominent. As leg locks spread through no-gi competition, single leg X turned into one of the standard launch points for straight ankle locks and heel hooks. It works in the gi too, where players like Lucas Lepri have folded it into hybrid guards, but its sharpest reputation comes from no-gi, where heel hooks are legal at higher levels, and the position’s leg-lock threats carry the most weight.

Frequently Asked Questions

What is single leg X guard used for?

It is used to control one of the opponent’s legs from the bottom, then either sweep them over to gain top position or attack the trapped leg with a foot lock, such as an ankle lock or heel hook.

Is single leg X the same as ashi garami?

Not exactly. Ashi garami is a broad term for leg-entanglement positions used to attack the legs. Single leg X is one specific position within that larger category.

What is the difference between X guard and single leg X?

X-guard controls both of the opponent’s legs and splits their base apart, while single leg X isolates and traps just one leg. Grapplers transition between the two freely.

Is single leg X good for beginners?

The control concept is approachable, but many of its leg-lock attacks, especially heel hooks, are restricted for lower belts and beginners in most rule sets, so newer practitioners often use it for sweeps first.

Who popularised single leg X guard?

Marcelo Garcia is most associated with bringing X-guard and single leg X to the international stage, and the position spread further as leg locks became central to modern no-gi grappling.

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Sources

1. BJJ Fanatics. “Single Leg X Overview.” Accessed June 2026.
   https://bjjfanatics.com/blogs/news/single-leg-x-overview
2. BJJ Fanatics. “Single Leg X Guard.” Accessed June 2026.
   https://bjjfanatics.com/blogs/news/single-leg-x-guard
3. BJJ World. “Breakdown Of The Best Single Leg X Guard Attacks.” Accessed June 2026.
   https://bjj-world.com/single-leg-x-guard-attacks/
4. Evolve MMA. “5 Must-Know X-Guard Variations To Elevate Your BJJ Game.” Accessed June 2026.
   https://evolve-mma.com/blog/5-must-know-x-guard-variations-to-elevate-your-bjj-game/
5. Evolve MMA. “3 Attacks From Single Leg X-Guard You Need To Know.” Accessed June 2026.
   https://evolve-mma.com/blog/3-attacks-from-single-leg-x-guard-you-need-to-know/
6. Grapplearts. “The Single Leg X Guard Masterclass.” Accessed June 2026.
   https://www.grapplearts.com/single-leg-x-guard-masterclass/

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