Grizzlies shake off ugly first half, beating Thunder 103-97 in OT for 3-1 lead in West semis

Oklahoma City Thunder's Thabo Sefolosha, of Switzerland, right, defends against Memphis Grizzlies point guard Mike Conley (11) in the first half of Game 4 in a Western Conference semifinal NBA basketball playoff series in Memphis, Tenn., Monday, May 13, 2013. (AP Photo/Danny Johnston) (The Associated Press)

Memphis Grizzlies' Mike Conley, right, shoots against Oklahoma City Thunder point guard Reggie Jackson (15) in the first half of Game 4 in a Western Conference semifinal NBA basketball playoff series in Memphis, Tenn., Monday, May 13, 2013. (AP Photo/Danny Johnston) (The Associated Press)

MEMPHIS, Tenn. – Tony Allen scored on a driving layup to open overtime and the Memphis Grizzlies held off the Oklahoma City Thunder 103-97 Monday night to push the defending Western Conference champions to the edge of elimination.

The Grizzlies shook off a first half in which they couldn't hit shots and the Thunder seemingly couldn't miss in building their largest lead in this series at 17 points. But the Grizzlies have yet to lose on their home court this postseason, and they won their third straight and seventh in eight games to grab a 3-1 lead in the series.

Game 5 is Wednesday night in Oklahoma City.

The Grizzlies outscored the Thunder 9-3 in overtime.

Kevin Durant scored 27 points but missed all five of his shots in overtime, including a layup in the final seconds.