HUNTERSVILLE, N.C. (AP) _ Mark Martin underwent surgery Wednesday to repair a broken tibia plateau in his left knee.

The NASCAR Winston Cup star was hurt in an accident last Friday at Daytona International Speedway. The fracture was identified during an MRI Tuesday.

Dr. Chuck Kollmer performed arthroscopic surgery in New Smyrna Beach, Fla., inserting a screw to hold the tibia in place. Martin will continue to wear a leg brace, which will allow him to drive in Sunday's race at New Hampshire International Speedway.

``Dr. Kollmer assured me that I will be able to drive this weekend in New Hampshire,'' Martin said. ``I'll go back to see him Monday after the race to evaluate how long I should wear the brace. Once I get this taken care of I should be much better since my wrist and ribs are already feeling better.''

The crash occurred when a tire was cut and the rapid loss of air sent Martin's car slamming into the wall. He drove in Saturday night's race and finished 17th despite a fractured bone in his left wrist, sore ribs and the knee injury.

Officials for Roush Racing said Martin intends to drive the entire race on Sunday, but that NASCAR Busch Series driver Matt Kenseth will be standing by should a substitute be needed.