Former Liverpool captain, Jamie Carragher, has claimed Cristiano Ronaldo will have a negative effect on the Manchester United team.

Ronaldo has returned to the Red Devils, 12 years after he left to sign for Real Madrid.

Many have tipped the 38-year-old to strengthen United and make them title contenders.

But Carragher is not getting carried away with the buzz surrounding Ronaldo’s arrival.

I’ve never seen so many ex-Manchester United players almost looking love-struck by the sign of Cristiano Ronaldo so it’s a huge moment for them.

“He is one of the greatest players of all time, no doubt, but I actually think it may have a negative effect on Manchester United,” Carragher said on a call promoting CBS’ coverage of the Champions League in the U.S.