In a post-game news conference, Gentry said his team's poor play in the first quarter cost them the game.
Monta Ellis hit an 20-foot fadeaway jump shot with 1 second remaining and the Golden State Warriors beat the Phoenix Suns 106-104 on Wednesday night.
Channing Frye's 3-point attempt rolled off the back of the rim at the buzzer, giving the Warriors their first win in Phoenix since March 18, 2005.
Ellis finished with a game-high 26 points, Dorell Wright had 23 and David Lee added 22 for the Warriors, who squandered a 21-point lead before rallying in the final 2:16.
Golden State played all but 1 minute of the final three quarters and the entire second half without Stephen Curry, who strained a tendon in his right foot with 2:19 to play in the first quarter.
Frye had 22 points, Marcin Gortat scored 21 and Jared Dudley finished with 17 for the Suns, whose two-game winning streak was snapped.