Inter Milan coach Walter Mazzarri has paid tribute to the "top-class" Nemanja Vidic after the defender opened his account for the Italian outfit on Saturday.

The former Manchester United stalwart bagged his first goal for the club in the pre-season win over Roma, with a glancing header that opened the scoring on 44 minutes.

Yuto Nagatomo doubled Inter's advantage in the second half to seal a 2-0 victory and, while Mazzarri was "really happy" with his whole team, the Italian reserved special praise for his summer signing from Old Trafford.

"I'm really happy with the lads, we're getting better by the game. Solid in defence, Vidic is top class," the coach told Inter's official website.

"We're creating lots in the final third, we just need to be a bit sharper with our final ball. We must keep going like this."

Inter kick off their new Serie A season with a trip to Torino on August 31.