Manchester United midfielder Owen Hargreaves is confident of success against Barcelona in the second-leg of their Champions League semifinal.

"We are optimistic as we will play a lot differently than we did at the Nou Camp," said Hargreaves. "We will attack Barcelona and see how they deal with it.

"They had a lot of possession but did not really penetrate us. We had a strategy and played really well."

Hargreaves added: "It is a great week with three fabulous games.

"Now it is up to us to do our best at Chelsea and take another step towards retaining our title."