Everton boss Roberto Martinez feels Manchester United have underperformed under David Moyes this season.
Moyes faces a hostile reception when he returns to Goodison Park and Martinez, who replaced Moyes at Everton last summer, raised the stakes by questioning the excuses given for United's rapid decline.
"They are still the league champions and they haven't lost anyone," said Martinez. "It's the opposite. They have two players on top.
"United's squad is bigger and better than people are trying to make out."
