Oklahoma City Thunder guard Andre Roberson will miss at least an additional two months after undergoing a procedure Thursday following a setback during his rehab from left knee surgery, a Thunder spokesperson said.

After suffering a ruptured patellar tendon in January, Roberson was on track to return to the floor in November, but he needed an additional procedure because a suture was causing irritation that he couldn't play through.

He's said to be healing properly from the initial surgery to repair his patellar tendon, but the suture needed to be removed.

Roberson, 25, will be re-evaluated in two months but will likely need more time before being available to return to the floor. He also underwent arthroscopic surgery on his knee over the summer to relieve inflammation that developed during his rehab.

Without Roberson, one of the premier perimeter defenders on the NBA, the Thunder will lean on a group of wings to replace him, including Terrance Ferguson, Timothe Luwawu-Cabarrot and Alex Abrines.