The Warriors open their Western Conference semifinal series against Memphis and all-world defender Tony Allen on Sunday."Tony is an excellent defender; obviously, one of the best in the league," Warriors head coach Steve Kerr said.With point guard Mike Conley's playing status in question because of facial fractures, it's unclear whom Allen will defend.According to SportVU data, Allen held opposing shooters to a field-goal percentage 7.5 percent lower than their usual proficiency during the regular season."I respect him a ton," said Warriors power forward Draymond Green, who finished second in Defensive Player of the Year voting.Allen missed the Grizzlies' third meeting with the Warriors this season because of a hamstring injury.The Warriors scored 111 points on 52.7 percent shooting from the floor and 54.2 percent shooting from three-point range in that victory.In the two matchups that Allen played against the Warriors this season, the teams split the outcomes and the Warriors averaged 102.5 points on 42.2 percent shooting from the floor and 40.3 percent shooting from three-point range.