The Golden State Warriors kept their NBA title defense alive on Wednesday with a 121-106 victory over the Los Angeles Lakers, who saw star center Anthony Davis depart after taking a blow to the head.

The Warriors cut the deficit in their Western Conference semi-final series to 3-2.

Golden State now must win on the road on Friday to give themselves a chance to win their respective series on Sunday.

Only 13 NBA teams have rallied from 3-1 down to win a series. The Warriors did it against the Oklahoma City Thunder in the 2016 Western Conference finals — then a Cleveland Cavaliers team led by LeBron James did the same against them in the NBA Finals.

"Coming into this game, we just wanted to win one, give ourselves a chance, knowing that we have a big game six down in LA and we obviously need that one to stay alive," Warriors star Stephen Curry told broadcaster TNT.

Curry scored 27 points to lead six Warriors players in double figures. Andrew Wiggins scored 25 points and Draymond Green delivered a double-double of 20 points and 10 rebounds.

"All the way up and down the roster there were contributions," Curry said.

The Lakers are unbeaten at home this post-season, but they could find themselves without Davis, who departed in the fourth quarter after taking an inadvertent elbow to the head from Golden State's Kevon Looney.

A rattled Davis, who scored 23 points and grabbed nine rebounds, headed for the bench and was eventually helped to the locker room, not returning to the game.

"He took a shot to the head," Lakers coach Darvin Ham said after the game. "He seems to be doing really good already. That's the status right now."