West Ham United boss Sam Allardyce believes they can test Manchester United tonight.

Despite the difference in class between the two sides, West Ham have pushed United in all of their meetings this season - coming within moments of knocking the Red Devils out of the FA Cup third round at home in January before Van Persie dispatched a brilliant equaliser deep into stoppage time.

"We will need to be on our best form, as always, if we are to get anything," said Allardyce.

"We have run them close three times this season, so we can give as good a performance as we gave in the last three (games)."