Manchester United boss Erik ten Hag admits he's worried they've lost their momentum due to the World Cup recess.

United return to domestic action on Wednesday night when they face Burnley in the fourth round of the Carabao Cup at Old Trafford.

Half of the United squad have been away on World Cup duty, and Ten Hag is worried that they will have lost touch with the 'rules and principles' he has implemented since taking over.

The Dutchman is particularly concerned that the passive style favoured by a number of nations at the finals does not fit United's proactive approach.

"They have been playing for six weeks in a different environment with a different style of play, and they have to get back to our rules and principles. All 11 players have to be on the same page.

"You saw in this World Cup many nations played passively, waiting and playing on the reaction.

"We have seen against Manchester City, that was our big problem in that game. We want to be dominant and proactive, but we played in a different way."