Michael Carrick is full of praise for new Manchester United teammate Robin van Persie.

Carrick is convinced that there is still more to come from the prolific 29-year-old.

"World-class players have got a presence," said the United midfielder.

"When the ball came to Robin for his first goal on Sunday (against Southampton), I was so confident it was going to be a goal. To have someone like that in your team is satisfying because you know if you supply him with the right ammunition, more often than not, he will put it away.

"To get off the mark with pretty much his first touch was special, then his hat-trick was much needed because we were in a tough position. It's a better start than he could have hoped for.

"We have got some firepower at the club now and whoever the manager calls upon, we will look dangerous."