The Spurs are heading back to the NBA Finals. Boris Diaw was the surprising hero, leading the Spurs with 26 points off the bench to guide them to a 112-107 overtime win over the Thunder in Game Six of the Western Conference Finals at Chesapeake Energy Arena. Tim Duncan scored 19 points and grabbed 15 rebounds while Kawhi Leonard added 17 points and 11 boards. Manu Ginobili chipped in with 15 for San Antonio, which will play Game One of the NBA Finals against the Heat on Thursday. The Spurs were without Tony Parker in the second half due to his ankle injury. Russell Westbrook led the Thunder with 34 points. Kevin Durant scored 31 points and snagged 14 rebounds while Reggie Jackson added 21 points for Oklahoma City.