Graeme Souness was critical of Manchester United pair Raphael Varane and Fred after Cody Gakpo put Liverpool 1-0 up at Anfield on Sunday.
The Dutchman finished coolly past David de Gea after an excellent run and pass from Andy Robertson, but Souness felt the goal should have been avoided.
'Fred gets it wrong,' he told Sky Sports. 'He doesn't need to take those steps to his right, an then he ends up slipping.
'Varane is very slow, he can't get his feet in the right place. You have to give Andy Robinson great credit, but then when the shot comes in [Lisnadro] Martinez cuts across De Gea's sightlines, he can't even make an effort to try and save it.