WWE has confirmed that Sin Cara underwent surgery on his right knee on Tuesday night. As noted, Cara had Dr. Jeffrey Dugas operate on the knee. The surgery took place at the Andrew Sport Medicine & Orthopedic Center in Birmingham, Alabama.

WWE reports that Cara sensed something wrong with his knee this past weekend and had it evaluated by doctors. The checkup found scar tissue that was hindering the performance of Cara's joint, and it was surgically removed.

There is no timetable for Cara's return to the ring, according to WWE. He last wrestled at the WWE live event on August 5 in Albany, Georgia.

Con los pies en la tierra 👇🏼 y la vista al cielo 🙏🏼. Primer día de recuperación...

With my feet on the ground 👇🏼 and my eyes in the sky 🙏🏼. First day of recovery ... pic.twitter.com/0gXnqanvMC

, Sin Cara (@SinCaraWWE) August 15, 2018

Hoy hicimos con el doctor Jeffrey Dugas unos pequeños ajustes en mi rodilla para volver con todo a mi terreno 🤼‍♂️. El cuerpo es sabio y te indica cuando parar ✋️. Pero también tiene memoria y sabe cuando volver 👊. pic.twitter.com/7yeYAWPHOs

, Sin Cara (@SinCaraWWE) August 15, 2018