We’re only seven days into 2015, and the Ultimate Fighting Championship has already seen three main events cancelled due to injuries.

The latest? Glover Teixeira, who recently challenged Jon Jones for the UFC Light Heavyweight Championship.

Ariel Helwani of MMA Fighting reported this morning that Teixeira has sustained a knee injury and will be unable to compete at UFC Fight Night 61, which was scheduled for February 22 in Porto Alegre, Brazil. The Brazilian-born, Connecticut-based Teixeira was to face Rashad Evans in the evening’s main event.

With that match scrapped, a planned Antonio Silva vs. Frank Mir bout, which was originally scheduled for UFC 184 in Los Angeles on February 28, will be moved to UFC Fight Night 61.

Instead of backing up Vitor Belfort’s challenge of Chris Weidman’s UFC Middleweight Championship, Silva vs. Mir will serve as headliner in Brazil.

Teixeira, who is 22-4 in his MMA career, is said to have sustained an injury to his knee in his last bout, a unanimous decision loss to Phil Davis at UFC 179 in October 2014. According to Helwani, Teixeira’s manager Ed Soares describes Teixeira as requiring six week weeks of physical therapy.

It was not announced what will be next for Teixeira’s scheduled opponent, Rashad Evans. The former UFC Light Heavyweight Champion Evans, 19-3-1 as a professional, is on a two-fight winning streak with wins over Dan Henderson and Chael Sonnen.

UFC Fight Night 61, also known as UFC Fight Night Porto Alegre, will also feature a lightweight bout between Edson Barboza and Micheal Johnson.