LeBron James knows he has "got to be better" after he was "not very good at all" in the Los Angeles Lakers' 116-99 Game 5 playoff defeat to the Memphis Grizzlies on Wednesday.

The Grizzlies kept the series alive at 3-2 with a comfortable victory at FedExForum, where Desmond Bane scored 33 points and had 10 rebounds.

Ja Morant also had a big night for Memphis, finishing with 31 points and 10 rebounds as the Lakers were unable to wrap up the series.

James could only muster 15 points and was taken off by head coach Darvin Ham after spending 37 minutes on court 

The legendary 38-year-old turned his attention to ensuring he delivers on Friday after falling short of his usually sky-high standards.

"Just got to be better. It starts with me. Tonight I was not very good at all. My defense was pretty good.

"Offensively, I was not really good. So, we've all got to do a better job helping one another."

James added: "I'll be better in Game 6."

Bane is adamant the Lakers will not finish off the job in Game 6.

"I said it out there, and I’ll say it again," Bane said. "We are going to be back for a Game 7 in front of the best fans in the NBA."