straight to your inbox every day for freeMason Greenwood has been challenged to keep matching his Manchester United performance level from the victory over West Ham.United teammate Scott McTominay lauded Greenwood's proactive performance in the 1-0 win for Ole Gunnar Solskjaer's side over the Hammers on Sunday night.Greenwood was unfortunate not to score, seeing one rasping shot hit the woodwork and another drilled effort well saved by West Ham keeper Lukasz Fabianski.