A crucial turnover brought a sour end to DeMar DeRozan's first game back in Toronto. Kawhi Leonard stole the ball from DeRozan to score the go-ahead dunk with 15 seconds left and the Raptors beat the San Antonio Spurs 120-117 on Friday night, spoiling the former Toronto star's return to Canada. "Tonight was like a playoff game," Leonard said. "We had to grind it out all the way to the end." Leonard scored 19 of his 25 points in the second half, and combined with Kyle Lowry to strip DeRozan at midcourt before racing in alone for a one-handed slam. "I knew they were going to be aggressive, trying to make a play on the ball and then foul," DeRozan said. "I've just got to be more aware." Traded to San Antonio in the offseason deal that sent Leonard to Toronto, DeRozan received a warm welcome but was denied a second victory over his former team. He finished with 23 points.