Davis had 30 points and 15 rebounds, LeBron James scored 26 and the Lakers completed their biggest rally in 21 years, beating the same team again in a 111-108 victory over the Dallas Mavericks on Sunday.

Davis dunked a missed shot and screamed after giving the Los Angeles Lakers the lead for good with two minutes to go.

So much for the 27-point deficit in a showcase of stars that went from a laugher to a thriller with 13 fourth-quarter lead changes.

The fourth win in five games for LA came after trailing by 27 in the middle of the second quarter — the same deficit the Lakers faced at the start of the fourth at home against Dallas on Dec. 6, 2002, before finishing a 30-point rally in a 105-103 victory.

“The guys never got discouraged,” Lakers coach Darvin Ham said. “They had that look of frustration, but it wasn’t a look of defeatedness on their faces. Everybody just wanted to stay encouraged.”

Davis and James were the fourth-quarter standouts as trade acquisition D’Angelo Russell sat out after spraining his ankle in a victory over defending champion Golden State in the previous game.

The Lakers had what looked like an ankle scare with James as the rally was gaining steam in the third quarter, with the recently crowned all-time scoring leader staying down for several minutes holding his lower right leg. He stayed in the game.

“It’s been better,” said James, who limped through the tunnel after the game. “But I definitely wasn’t going to locker room and not finish the game. The importance of this game and then the momentum that we had, I felt like we could steal one after being down.”