Sin Cara posted the following on Twitter, regarding his knee injury and surgery…

Thanks for all your support. On my road to the hospital for a mini surgery. See you later guys.

WWE.com also posted the following update…

Two days after being attacked by The Shield on SuperSmackDown LIVE, Sin Cara tweeted Thursday that he will undergo surgery. The masked Superstar offered no specifics on the procedure or the extent of his injury, though it was previously reported The Shield's ambush caused a right knee injury that was described as "serious."