TALLAHASSEE, Fla. - Tyler Hansbrough had 22 points and a career-high 21 rebounds and No. 4 North Carolina beat Florida State 84-73 in overtime on Sunday.

North Carolina's Tyler Hansbrough, top, shoots over Florida State's Ryan Reid for two second-half points in a basketball game, Sunday, Feb. 3, 2008, in Tallahassee, Fla. North Carolina won 84-73 in overtime. (AP Photo/Phil Coale)

Florida State's Ryan Reid hit a desperation shot from the corner — the first 3-point attempt of his career — with 8.1 seconds left in regulation to tie the game at 67. North Carolina failed to get off a shot before the buzzer.

But Hansbrough, who was held without a field goal for the first 30 minutes of the game, and Danny Green took over in the extra period.

Hansbrough had eight points and five rebounds in the overtime while Green scored the final three of his 19 points to spark North Carolina's 10-2 run that broke open the game.

Hansbrough, the ACC's leading scorer and rebounder, was held without a field goal until 9:43 remained in the game. He was just 5-of-14 from the field, but was 12-of-14 at the free throw line.

North Carolina (21-1, 6-1 Atlantic Coast Conference) made 27 of 33 free throws.

The Tar Heels lost starting point guard Ty Lawson just 4 minutes into the game. Lawson, who is averaging 14.1 points and 6.0 assists, sprained his left ankle after colliding with the 6-foot-8, 240-pound Reid underneath the North Carolina basket.

Florida State (13-10, 2-6) trailed 31-29 at halftime despite shooting a chilly 34.4 percent in the opening 20 minutes.

Jason Rich led the Seminoles with 22 points while Isaiah Swann and Toney Douglas added 12 each, although Douglas was just 3-of-20 from the field.