Russell Westbrook
Feb 8, 2016; Phoenix, AZ, USA; Oklahoma City Thunder guard Russell Westbrook (0) smiles on the court in the game against the Phoenix Suns at Talking Stick Resort Arena. Oklahoma City won 122- 106. Mandatory Credit: Jennifer Stewart-USA TODAY Sports

Oklahoma City Thunder leader, Russell Westbrook, underwent arthroscopic surgery on his right knee earlier today and will be sidelined for four weeks.

The 29-year-old guard will miss the entire pre-season, while he may not be available for the Thunder’s opener against the defending champions, the Golden State Warriors, on October 16.

This marks the fourth surgery on Westbrook’s right knee, while the player will be re-evaluated in a month and next steps will be determined from there.