Bulls rookie Derrick Rose will miss the rest of the NBA summer league due to tendinitis in his right knee, the Chicago Tribune reported Friday.

Rose, the top pick in June's draft, will undergo an MRI, though the Bulls insist the injury isn't serious, the report said. General manager John Paxson said Rose will start a leg-strengthening program when he returns to Chicago, according to the Tribune.

"They say it keeps happening because I'm young and my legs aren't strong enough," Rose told reporters in Orlando, according to the Tribune.

Rose, who led Memphis to the national championship game in March, injured the leg during Tuesday's win over Indiana, then sat out games Wednesday and Thursday.

The Bulls have been here before. Their top pick last year — Joakim Noah — missed the 2007 summer league with a rotator cuff tear.