Ralf Rangnick issues Reds alert after Man Utd toil to victory over Norwich

Ralf Rangnick admits Manchester United will need to perform much better to get anything at Liverpool after Cristiano Ronaldo came to their rescue against Norwich on a day that saw anti-Glazer protests and fans turn on Paul Pogba.

Thousands of supporters protested against the owners ahead of Saturday’s encounter at Old Trafford, where Kieran Dowell and Teemu Pukki goals cancelled out Ronaldo’s first-half brace.

Anti-Glazer chants were joined by those criticising the side as United toiled against the Premier League’s bottom side, with some supporters singing “you’re not fit to wear the shirt” at their players.

But Ronaldo saved the day by completing his hat-trick and securing a 3-2 win, injecting new life into their top-four hopes ahead of Tuesday’s trip to Liverpool.Jurgen Klopp’s Reds remain in contention for an unprecedented quadruple after beating Manchester City in the FA Cup semi-finals on Saturday and Rangnick knows his side will need to step their level up at Anfield.

“I mean, everybody has seen today’s game,” interim boss Rangnick said. “We all know what team we’re playing on Tuesday.

“They won against Man City today, they’re in the FA Cup final. In the end they might have the chance to win four trophies this season.

“If we play like we played today, it will be very, very difficult to get even a point out of this game and this is what we have to be realistically aware of.

“So, we need to raise our own level and standard. Probably Fred and Scott (McTominay) will not be back, Raphael Varane will also be a tight race for the game on Tuesday. So far he hasn’t trained with the team.

“We have to be aware that the players that we had available today we will drive to Liverpool and just get anything out of that game.

“If