Manchester United defender Rio Ferdinand says the combination of Wayne Rooney and Carlos Tevez in attack is beginning to gel.

After their 4-1 victory at Aston Villa, Ferdinand said: "Wayne is in the groove and he is one of those who gets goals in spurts. He is one of those who goes on a mad goal spree.

"Wayne is definitely capable of getting 20 odd goals this season. He did it last season and I'd put money on him to do it this season if I was a betting man.

"Top players always bounce back from setbacks. We had a setback in mid-week with England and, as a top player, Wayne came back strongly for us.

"Carlos has done very well and has been fantastic since he came here. He is someone who will probably get a few more assists and maybe not as many goals as 'Wazza' but I am sure he will be around the 15-20 goal mark as well.

"Carlos gets in the holes between the midfield and the defence of opponents and, if he can keep doing that and slipping the ball through to Wayne, they will continue to be a formidable pairing.

"It is fantastic for us to have Wayne and Carlos. The myth about the two of them not being able to play together and it was finally put to bed against Villa.

"God knows what the manager (Sir Alex Ferguson) is going to do when Louis (Saha) is fit as well because there are three more than capable players up there who can bang the goals in for us."