PITTSBURGH — Pittsburgh senior forward Nasir Robinson will undergo surgery to repair torn meniscus in his right knee Friday. He is expected to miss three weeks.

The procedure is the second on Robinson’s knee in as many years. He missed the first three games of the 2010-11 season after injuring the knee last fall.

The 6-foot-5 Robinson averaged 9.4 points in 31 games last year.

for the Panthers.