Former No.1 draft pick and Australian youngster Ben Simmons had his first match-up with superstar and mentor LeBron James on Tuesday.

It didn't go to plan for Simmons, with the Cleveland star making a statement against the youngster many have labelled a young LeBron, dropping 30 points, 13 rebounds and six assists against Philadelphia, to help the Cavs to a 113-91 win.

Simmons also suffered what appears to be a minor ankle sprain compounding the loss for the 76ers.

The Melbourne-raised rookie managed just 10 points for the match, a career low in his first season.

After the match, James heaped praise on the young Aussie, who he was matched up with for most of the game.

โ€œI'm honoured that a young, gifted kid like himself would even allow me to be part of his life, and allow me to mentor him and be a big brother to him,โ€ James said after the game.

โ€œI'm honoured by that, and I'll continue to do that, as long as he would like me to.โ€

Simmons, who is the hot favourite to win the Rookie of the Year award, is averaging 18.1 points, 9.1 rebounds and 7.4 assists per game.