Liverpool legend Robbie Fowler says manager Jurgen Klopp must strengthen his title winning squad for next season.

Speaking to Premier League Productions, Fowler insisted that if they don't strengthen their side, they will end up going backwards next season.

Fowler said: "Listen, he knows what his players are.

"I would be amazed if he isn't looking at the transfer window anyway.

"We know as players ourselves that if you've got aspirations of winning leagues, you've got to go and sign players.

"Just because you've won the Premier League, that doesn't mean you're happy with the squad.

"You've always got to grow.

"When you think of Man City, they're going to lose [David] Silva, [Sergio] Aguero could be coming towards the twilight of his career, they've lost [Leroy] Sane, [Benjamin] Mendy isn't reliable because of his injuries, they're going to go out and sign players.

"Any time you want to stay at the top, you've got to bring players in.

"The teams behind you are going to bring players in, so if you're not signing players, you're not standing still - you're going backwards."