Liverpool usurped Manchester City to take top spot in the Premier League but needed a James Milner penalty nine minutes from time to see off lowly Fulham 2-1 at Craven Cottage on Sunday.

The on-form Sadio Mane put the visitors in front midway through the first half, but a rare defensive mix-up between Virgil van Dijk and Alisson Becker allowed Ryan Babel to give his former club a huge scare 16 minutes from time.

Fulham's awful defending all season is the reason they are heading back to the Championship after just one season back in the top flight, and the hosts gave Jurgen Klopp's men a much-needed gift when goalkeeper Sergio Rico bundled over Mane and Milner secured all three points from the spot.

Liverpool now hold a two-point lead over City, but the champions have a game in hand.

"Average game, sensational result," said Klopp of his side's performance.

"City don't look like they will drop a lot of points, so we have to win and win and win. That's our job to do."

Liverpool completed a clean sweep of four English sides into the quarter-finals of the Champions League with a highly impressive 3-1 win at Bayern Munich on Wednesday.

But they nearly suffered a very costly European hangover against a Fulham side still 13 points adrift of safety.

"We had to run a lot in a week where we ran a lot," added Klopp to justify an at times lacklustre display at such a pivotal stage of the season.

Most of the visitors' attacking threat came down their left side through Mane and the Senegalese proved the source of the breakthrough on 26 minutes.

Mane scored twice in Munich in midweek and took his hot streak to 11 goals in 11 games with a simple finish after exchanging passes with Roberto Firmino.

Liverpool started the second half with greater intent to try and put the game to bed.

Andy Robertson was the provider as Georginio Wijnaldum headed a good opportunity over at the far post before Rico was called into action to deny Van Dijk.

However, as a torrential rain shower swept over the banks of the Thames to make playing conditions hazardous, Liverpool's slender lead proved a dangerous one.

Floyd Ayite was rightly flagged offside as he headed a deflected shot past Alisson before the Brazilian number one got down well to save from Andre Zambo Anguissa.

Mane was inches away from securing the points and doubling his tally for the day with a deft header from a corner that clipped the top of the crossbar.

Disaster seemed to have struck for Liverpool when Van Dijk's header back towards Alisson didn't have enough purchase and Babel stepped in with the break of the ball to tap into an empty net.

"I am not giving excuses. I should have handled it better," admitted Van Dijk.

However, the league leaders showed why they are in the running to end a 29-year title drought to get a vital three points with the help of some erratic goalkeeping from Rico.

"I saw the reaction of my players and I'm really pleased with that," added Klopp. "After the equaliser we were much clearer than before the equaliser."

Mohamed Salah's goal drought continued as the Egyptian has scored just once now in his last 10 games, but it was his shot that Rico spilled before the Spaniard unnecessarily pulled down Mane.

Milner took responsibility instead of Salah from the penalty spot and calmly sent Rico the wrong way to restore Liverpool's lead, which this time they never looked like letting go.