Thunder center Kendrick Perkins spent roughly 20 minutes of court time Sunday morning inside the team's practice facility under the watchful eye of assistant coach Mark Bryant, medical services director Donnie Strack and director of athletic performance Dwight Daub. Obtained in a deal with the Boston Celtics just before the league's trade deadline on Feb. 24, the 6-foot-10, 280-pound Perkins is rehabilitating a sprained left knee that is expected to keep him out of the starting lineup another one to two weeks. Thunder coach Scott Brooks said Perkins also did 15-20 minutes of court work Saturday. "It was not at game speed, but he got up and down the court, shot some free throws, he's coming along. We're excited that he'll be with us soon," Brooks said. "He wants to get out there, and you want guys (who want) to get out there. You don't want guys who are comfortable being inactive. He's anxious to get on the court. He likes what we're doing. He likes the guys. He knows that he can help." As for other Thunder injuries, starting forward Kevin Durant will start today's 6 p.m. game against Phoenix inside Oklahoma City Arena. Durant sprained his left ankle in the third quarter of Wednesday night's home victory against Indiana and remained in the starting lineup Friday night, finishing with 29 points, eight rebounds and five assists in 40 minutes in a victory at Atlanta. "Everything's good," Brooks said of Durant. "He came in (Saturday) on his day off, got in some shots. He's fine." Newly acquired guard Nate Robinson, who had arthroscopic surgery on his right knee last Friday, is expected to miss 4-6 weeks. Robinson was receiving treatment and did not participate in Sunday's shoot-around. He was later seen on crutches, shouting encouragement to Perkins and then shooting free throws while sitting on a chair.