Andy Robertson wants his Liverpool teammates to respond with a “proper LFC performance”

Left-back Andy Robertson issues Liverpool FC warning to Chelsea.

Andy Robertson has issued an apology to Liverpool fans [Getty]

Andy Robertson issued a rallying cry to his Liverpool teammates asking them to respond with a “proper LFC performance” after their unbeaten Premier League run came to a halt at Watford on Saturday.

Jurgen Klopp's Reds were beaten 3-0 by relegation-threatened Watford - who had gone six games without a win in all competitions at Vicarage Road.

Two goals from Ismaila Sarr and one from Troy Deeney meant Liverpool were not going to eclipse Arsenal's Invincibles of 2003-04 that went an entire Premier League season unbeaten.

However, left-back Robertson admitted his side were below par against the Hornets, and they must bounce back to winning ways when they take on Chelsea at Stamford Bridge in the FA Cup on Tuesday night.

"Watford were at it from the start and we took time to get going," he told Liverpool's website. "We had a couple of good moments but nowhere near enough for this Liverpool team.

"It's a performance that has not been expected for a number of years by the fans and we can only apologise for this performance.

"It's up to us to now bounce back because today wasn't good enough, simple as that. Watford deserved the three points; they were brilliant to a man. And we weren't.

"It's up to us to now show that this defeat hurts and up to us to now go and put a run together that will crown us champions."

Liverpool remain 22 points above second-place Manchester City and are on the right track to end the season as Premier League champions.

"Our message has always been the same: we can't get carried away," said Robertson. "Of course, fans are going to get carried away and enjoy the moment we're in and that's nice for us because if our fans are enjoying the way we're playing and what we're doing, it means we're doing something right.

"We really need to put in a proper LFC performance and show everyone that this was just a blip, that now we're going to crack on and get to where we want to be. Everyone knows where that is – but it's up to us to now show it."