The knee injury that will sideline North Carolina junior Bobby Frasor for the rest of the season is limited to a torn ligament.

Frasor tore his anterior cruciate ligament in the top-ranked Tar Heels' win over Nevada on Thursday night. The school said tests performed Friday morning found no additional damage to the knee.

The injury robs North Carolina (12-0) of a versatile veteran who can play either guard position. Coach Roy Williams said Frasor will need surgery, which is expected to be performed in the coming weeks.

Frasor stole the ball twice in the backcourt shortly before the injury in the second half, helping him earn the team's award for top defensive player for the fifth time this season.