Cleveland Cavaliers forward LeBron James has said that his main challenge at the moment is ensuring that his side are "laser sharp" as they look to win the NBA Finals.

The Cavs currently hold a 2-1 lead over the Golden State Warriors in the seven-game series, with James seeking to bring a title back to the franchise where he began his career.

"Obviously, I'm not getting much sleep right now," said James, according to the NBA's official website.

"But I'm okay with that. I'm okay with not sleeping to be able to prepare myself and mentally keep myself intact on what's the main objective for me right now, and that's to make sure my guys are laser sharp, get myself mentally prepared, physically prepared to go out and battle.

"It's been a difficult challenge, a tough challenge, but I knew that. Being the sole leader of a team and a franchise, it's taxing, but I accept the challenge. I accept it all and I'm okay with it."

Game four between the sides takes place on Thursday night, as the series now moves onto Cleveland's home turf at the Quicken Loans Arena.