Inter Milan captain Javier Zanetti admits his side face a daunting task in trying to knock Manchester United out of the Champions League.
The Italian side travel to Old Trafford with the tie delicately balanced after a goalless draw in the first leg last month.
Zanetti is confident Inter can rise to the challenge of dumping out United, but concedes they are the best side they have faced in recent seasons.
"This must be the strongest side we have faced at this stage, better than Villarreal, Valencia and Liverpool," said Zanetti.
"I think that gives us an advantage because we play better and I feel we can beat them.
Attack"We won't make the mistake of sitting back - we need to go out to win the game.
"They are a determined side and we can use the counter-attack to our advantage.
"However, if we wait for them to do the attacking then we are going to get beaten.
"They have more than just Cristiano Ronaldo going forward - there are lots of dangerous players."