In mixed martial arts, the moment a southpaw and an orthodox fighter square off, the fundamental rules of striking geometry change. This matchup creates what is known as an “open stance” alignment. Unlike a closed stance (orthodox versus orthodox or southpaw versus southpaw), where the fighters’ torsos are somewhat shielded and their lead sides cross, an open stance mirrors the fighters. Their lead feet and lead hands are on the same side, directly facing one another, leaving the center of their bodies exposed.

For decades, this dynamic has been the source of the fabled “southpaw advantage.” However, mastering the open stance is less about inherent biomechanical superiority and more about understanding the specific tactical battles it creates. From the fight for foot positioning to the repurposing of the jab, navigating a mixed stance matchup requires a specialized toolkit that blends striking mechanics with spatial awareness.

The Geometry of the Open Stance and the Southpaw Myth

A common misconception in combat sports is that southpaws possess a magical, biomechanical advantage over orthodox fighters. In reality, the geometric advantages of an open stance are perfectly symmetrical. Both fighters have their power side lined up with their opponent’s centerline, and both fighters have their lead hands occupying the same space.

The true “southpaw advantage” is purely experiential. Because the vast majority of the population is right-handed, southpaws spend almost all of their training camps and professional bouts facing orthodox opponents. They are intimately familiar with the angles, distances, and timing required to win an open stance matchup. Conversely, an orthodox fighter might only face a southpaw a few times in their career, making the mirrored alignment feel awkward and defensively disorienting.

The Battle for Outside Foot Position

The most critical tactical objective in an open stance matchup is securing the outside foot position. Striking analysts often refer to this as the golden rule of southpaw versus orthodox engagements. The goal is to place your lead foot to the outside of your opponent’s lead foot.

Winning this positional battle accomplishes two vital geometric goals simultaneously:

• Offensive Alignment: It creates a direct, unobstructed path for your rear power hand (the cross) to land flush on the opponent’s chin.
• Defensive Safety: It moves your head off the opponent’s power line, forcing them to punch across their own body to land their rear hand, which severely reduces their reach and power.

Conor McGregor’s legendary rise through the featherweight and lightweight divisions was largely built on his mastery of this concept. Against fighters like Jose Aldo and Eddie Alvarez, McGregor consistently stepped to the outside, lining up his devastating left cross while keeping himself safe from their right hands.

Hand-Fighting and the Repurposed Jab

In a closed stance, the snapping lead jab is the foundational weapon of striking. In an open stance, however, the mirrored lead hands physically obstruct one another. A traditional straight jab will often just crash into the opponent’s lead glove.

This does not mean the lead hand is useless; rather, it must be repurposed. Fighters in an open stance rely heavily on hand-fighting, parrying, and trapping. The lead hand is used to measure distance, blind the opponent, and control their lead wrist. By pressing down or pulling away the opponent’s lead hand—a technique known as trapping—a fighter can clear the path for their rear cross. The battle of the lead hands is a constant, high-speed chess match that dictates who gets to fire their power shots down the pipe.

The Devastating Power of the Rear Body Kick

The mirrored alignment of an open stance exposes the torso’s “open side” (the side of the navel and chest). In a standard orthodox matchup, a rear roundhouse kick often strikes the opponent’s back or requires wrapping around a tight guard. In an open stance, the rear kick slams directly into the opponent’s open torso.

For a southpaw, the left body kick is a high-percentage, highly damaging weapon that targets the orthodox fighter’s right arm, ribs, and liver. Historically, fighters like Mirko Cro Cop used this dynamic to devastating effect, punishing the open side whenever opponents attempted to circle away from his left straight. Repeatedly landing the rear body kick degrades the opponent’s ability to throw their own cross, damages their midsection, and rapidly saps their cardiovascular endurance.

Bypassing the Guard: The Mechanics of the Lead Hook

Because the straight jab is easily parried or blocked by the mirroring lead hand, the lead hook becomes a primary weapon for bypassing the guard in an open stance. Instead of traveling in a straight line, the lead hook loops around the opponent’s obstructing lead hand, targeting the side of the head or the jaw.

Furthermore, because fighters often have to lunge forward to close the slightly greater distance inherent in an open stance, the lead check hook serves as a devastating counter. When an opponent steps forward aggressively, the check hook catches them as they step into a blind spot. Marlon Moraes famously highlighted this mechanic against Henry Cejudo, utilizing the lead hook to punish Cejudo’s forward lunges and exploit the spatial vulnerabilities of the mixed stance.

Takedown Synergy in Mixed Stances

The battle for foot position in an open stance is not limited to striking; it directly influences grappling and wrestling entries. The footwork required to win the outside angle perfectly disguises specific takedown attempts, forcing the opponent to guess whether a strike or a level change is coming.

When a fighter steps to the outside of their opponent’s lead foot, they are perfectly positioned for an outside step single-leg takedown or a high crotch. Because the striking threat of the rear cross is so high from this angle, the opponent’s defensive reactions are often focused upward, leaving their lead leg vulnerable to a well-timed shot. This synergy between striking angles and wrestling entries is a hallmark of elite MMA gameplans.

Re-evaluating Inside Foot Position

While outside foot position is the standard goal, a common misconception is that inside foot position is always a tactical failure. At the highest levels of MMA, fighters will deliberately concede the outside angle to set up specific attacks.

Taking the inside foot position can be used strategically to set up inside leg kicks, attacking the vulnerable inner thigh of the opponent’s lead leg. It can also be used to create angles for certain takedown entries or lead-leg high kicks. However, operating from the inside foot position requires exceptional defensive responsibility, as it places the fighter directly in the path of the opponent’s rear power hand. Fighters like Islam Makhachev have demonstrated the dangers of this space, using the “open side counter” to time opponents who step inside with devastating rear-hand counters over the top.