Liverpool have failed to move five points away from Manchester City after being held at the London Stadium to West Ham United.
Sadio Mane gave Liverpool the lead early on, with James Milner appearing in an offside position once the replays were shown.
However, West Ham weren't behind for long - with Michail Antonio finishing off a clever free-kick just six minutes later.
The result sees Liverpool draw for the second consecutive game - and it means City could go top with a win against Everton on Wednesday night.
Image via @PremierLeague
The Hammers started on the front-foot at the London Stadium - with Javier Hernandez and Aaron Cresswell both offering the Reds warnings with early shots.
But Jurgen Klopp's side did eventually take the lead. On 22 minutes, Adam Lallana, who was in for the injured Gini Wijnaldum, skipped away from the West Ham defenders with brilliant footwork and fed an offside Milner, who crossed the ball into Mane; who finished in excellent fashion.
It all looked good for the Premier League leaders - but that moment of magic from Mane, mixed with some luck, proved to be their best moment of the game.
Image via @PremierLeague
Fabinho gave away a cheap free-kick - something Liverpool did a lot of - and this allowed the outstanding Felipe Anderson to find Antonio; who finished very well.
Mane had another chance for Klopp's men, but his header from Milner's free-kick was too close to Lucasz Fabianski.
The second-half was pretty quiet in truth, with not many opportunities for either team to claim the three points.
But Mark Noble had a chance following Robert Snodgrass' cross, but the Hammers captain lashed the ball over.
Divock Origi, a second-half substitute, was found by Naby Keita in stoppage-time, but the Belgian striker could only scuff his shot.
A chance for Origi to make himself a hero in front of the traveling Liverpool faithful - but one that was wasted.
The Managers
West Ham United boss Manuel Pellegrini: "We returned to the pace we have shown in previous games. You cannot play in any games if you do not have high pace.
"After we beat Arsenal, it was similar work that we did today. We created more chances tonight, but having lost those three games, the team we saw tonight is the team we must try to play from now until the end of the season."
Liverpool manager Jurgen Klopp: "It was not our best performance of course because we came up against difficult opponents.
"We had good moments, coming through the channels and scored the goal, which I've been told is offside. This explains a little bit the second-half, because I think the referee knew at half-time.
"He knew it for sure at half-time, and then you saw a lot of strange situations. They were not decisive but just rhythm breakers. That obviously didn't help us."