Carlo Ancelotti believes Chelsea and Manchester United have run out of ways to surprise each other ahead of Sunday's Barclays Premier League title showdown at Old Trafford.
The sides meet for the fifth time this season and for the fourth in just over two months for a match which could ultimately decide the destiny of the championship.
Never before have the two clubs gone head to head so often during a single campaign, with the pair contesting the Community Shield and Champions League as well as the Premier League. Such familiarity can often breed contempt - as Barcelona and Real Madrid found out.
But Ancelotti feels Chelsea and United's problems on Sunday will be more straightforward than that, especially as his only real selection dilemma appears to be whether or not to start with Fernando Torres.
"I think that Chelsea and Manchester United don't have secrets," he said. "They know very well every aspect of their football and their skills. They know us, we know them.
"I learned that (Wayne) Rooney is the key player for United, and also (Ryan) Giggs against us was the best player."