Wayne Selden scored a game-high 24 points as the Memphis Grizzlies defeated the Miami Heat in double overtime 98-95 in the Las Vegas Summer League quarterfinals at Thomas and Mack Center on Saturday. In a game that featured 10 ties and 15 lead changes, Miami's Gian Clavell hit a three-pointer with five seconds left to force the first overtime. Both teams went cold in the opening two-minute session, going 1-for-6 from the field, with the Grizzlies shooting 0-for-3, their lone points coming on two free throws. But in the second overtime, the Grizzlies, trailing 94-93 with 1:27 remaining, went on a 5-1 run to put the Heat away.