Jamie Redknapp has described Memphis Depay as a liability for Manchester United. The Dutch winger made a big-money switch to Old Trafford in the summer, but has consistently underwhelmed for the Red Devils this season.

Depay delivered another below-par performance for United against Liverpool in the Europa League, conceding a first-half penalty and offering minimal threat in the attacking third throughout.

"Not only is Memphis Depay failing to do the business in the final third, he is becoming a liability around United's penalty area," Redknapp said of the United attacker in the Daily Mail. "The Dutchman's lazy challenge gave Liverpool their opener, and his concentration was just as poor as when his shocking header back to David de Gea gifted Stoke City a goal on Boxing Day."

Meanwhile, Redknapp also claimed the 2-0 defeat for United at Anfield has done serious damage to Louis van Gaal's hopes of retaining his job at Old Trafford. "The pressure was on Liverpool on Thursday night, and they put in a very good performance when they needed to," he said.

"Jurgen Klopp has been there for four months now and people – myself included – have been wondering how they've moved forward since Brendan Rodgers. They still have the ability to be great on their day and frustratingly inconsistent, but they put one over on their biggest rivals for the first time in five games and the fans will love Klopp for it.

"These are the sorts of games that can determine which way your tenure as a manager goes, and this includes Louis van Gaal. Unless he can upset the odds in the second leg, this defeat could be very damaging," Redknapp said of Van Gaal, who became the United manager in 2014.