Liverpool great Graeme Souness believes that teams have found a way of nullifying the threat of Manchester United by restraining midfielder Marouane Fellaini.

The Belgium international has been a key figure in United's recent turnaround in form but Souness believes Chelsea and Everton have toppled United by neutralizing the threat of the former Toffees ace.

"If you go back a week, (Louis) van Gaal said after the Chelsea game that it was the best his team have played since his time at Manchester United," Souness told Sky Sports.

"We highlighted Fellaini before the game and how much of the attacking side of Manchester United is down to him. He is a real threat for them when he gets in the final third.

"The threat was taken away last week with Kurt Zouma man-marking him and this week he gets himself in trouble early on. It looks like he could get sent off so he's been taken off and the threat is gone.

"He is such a large part of Man United when they get in the last third. Have they learnt how to play against Man United? Take care of Fellaini and you're a long way to taking care of them."