Jurgen Klopp insists Liverpool are in for a “tough” game at Watford and does not believe complacency is starting to affect his players as they seek to take another step closer to their first league title in 30 years.

The Reds head to Vicarage Road with a seemingly unassailable 22-point lead at the top of the Premier League and need just four more victories to guarantee finishing the season at the summit for the first time since 1990.

Liverpool made it a record-equalling 18 successive victories on Monday when they beat West Ham United 3-2, but did so having come from behind for the first time in a Premier League match since November 2 at Aston Villa.

"I watched the game back, and in that game being 2-1 down helped us a little bit because the direction after that, a lot of things were different," Klopp said.

"I didn't know it was the first time since Villa, but the boys reacted well and that's the only thing we have to know.

"Some people used the word complacency, that they saw glimpses of that. I didn't see that at all.

"It's a long season and the concentration level can drop from time to time in all teams, in games and between games. How much the boys fight for a result is exceptional.

"There is no fear about anything, but we also don't take it for granted that there will just be one or two goals up.

"This game (against Watford) will be tough. I said it, 100 per cent. I don't want people to think we are going to win 6-0. It just will not happen."