Chelsea midfielder Frank Lampard admits they face a huge test on Sunday at Manchester United.

Lampard told Chelsea TV: "There are quite a few to look out for up front but Ronaldo and Rooney.

"Rooney is an amazing talent and in the big games is very up for it, Ronaldo is World Player of the Year, can change a game in a second and always has good ding dongs with Ashley [Cole] whenever he plays against him, so those two and if you go past them you have Berbatov, Tevez, and they have a lot of strength in depth."