Tim Duncan scored 28 points, Kawhi Leonard added 23, and the defending champion Spurs beat the Clippers 111-107 in overtime in Los Angeles on Wednesday night, tying their Western Conference quarterfinal series at 1-1.Duncan scored four straight points in the extra session while playing with five fouls, his jumper snapping a 101-101 tie.Mills followed with a fast-break driving layup off Leonard's long pass, and Leonard scored on a layup for a 107-101 lead with 56 seconds left.Los Angeles' Blake Griffin had his first career playoff triple-double with 29 points, 12 rebounds and 11 assists.The Grizzlies took full advantage of starting the playoffs with home-court advantage for only the second time in their short postseason history.Paul Millsap scored 19 points and top-seeded Atlanta survived a tougher-than-expected test from visiting Brooklyn to take a 2-0 lead in their Eastern Conference quarterfinal series. ...