Andrew Robertson admits he was left throwing up at the end of his first training session with Liverpool.

Jurgen Klopp and his staff have been known to put their players through rigorous fitness tests and sessions to whip them into shape.

And it all proved a little too much for Robertson.

He explained to the Peter Crouch podcast: "The day I signed we got the tour of the stadium and stuff and that is when it really hits home.

"But I remember my first day, there was only six or seven of us because it was pre-season, so only a few of us in and Danny Ings was just coming back from long-term injury.

"So he stayed behind and we had to do the lactate test that the Germans love, it's basically running to your maximum.

"I remember running alongside Danny Ings and I was just sick everywhere! Actually physically sick."

Robertson continued: "[With the test] they set up poles around the pitch and you have to make each pole on the whistle but then it gets faster and faster.

"My medical took two days so I didn't really eat, so I put it down to that and I was tired.

"Ingsy was talking to me on the way round and I could just feel it, I knew something wasn't right. I tried to hold it in my mouth and I just had to let it go. It was terrible. Day one!

"Luckily the gaffer [Klopp] wasn't there and I thought I'd got away with it and he returned three days later and introduced himself, blah blah blah, and then he called me Mr Sick Boy or something like that. I was gutted!"