Owen Hargreaves admits Manchester United face a tough task defending their Champions League crown this season.

"It is not impossible to retain the Champions League but it is going to be difficult," said Hargreaves. "Barcelona have signed the right players, Real Madrid look good, and Chelsea have improved dramatically.

"It's going to be tough and it's a big ask. But we are very capable of doing it again."

The midfielder also told manutd.com: "I think we can get better.

"I definitely believe that. Cristiano is injured and Anderson will be away at the Olympics, so we will miss them early on. But apart from that the squad looks good. Even the younger players. Wayne is only 22 so he will improve.

"These players have been together for another year and I am looking forward to seeing how they do together. Gary Neville is also back, so it's looking good for us."