Chelsea striker Romelu Lukaku admits he's unsure of his role under manager Thomas Tuchel.

The Belgian, 28, scored in the Premier League for the first time since September as the Blues came from behind to win 3-1 at Aston Villa on Boxing Day.

"Me and the coach, we had a couple of conversations about whatever he wanted from me. Obviously I told him I'm multidimensional," Lukaku told ESPN Brasil.

"It's just about having a bit of clarity about how he wants to use me. And then whatever he wants from me, I can do whatever aspects he wants for the game.

"I can run in behind, I can press, I can hold the ball up. So I think throughout the years these are qualities I added to my game.

"So I just wanted an opportunity, I got it today, I'm happy that I helped the team, now I just want to move forward."