Chelsea boss Enzo Maresca pointed to a lack of "clinical" finishing from his title-challenging side after they were held to a frustrating goalless draw at Everton, handing a major boost to Premier League leaders Liverpool.

Arne Slot's were guaranteed top spot at Christmas no matter the result after Maresca's men failed to break down an obdurate Everton backline, but thrashed Tottenham 6-3 later on Sunday to move four points clear.

The weather was often dreadful with swirling wind and rain, but it was the visitors who carved out the better chances with Jordan Pickford denying Nicolas Jackson following a sweeping team move and the Senegal international heading against the post from close range.

At the other end, Orel Mangala's low strike from outside the area was pushed away by Robert Sanchez at full stretch in Everton's best opening of the first half.

"Defensively they are top - they are one of the five-best teams in Europe in terms of clean sheets so you struggle to create chances against them," said Maresca.

"All in all in these kind of games, knowing you are not going to create many chances, you have to be clinical.

"If you are able to be clinical then and score, the game can be completely different but until that moment you will struggle."

Jack Harrison, who is without a goal or assist in the league this season, should have put the hosts ahead at the start of the second half when he found space in the box, but Sanchez spread himself to keep out a tame effort.

Sean Dyche's side battled hard and could have won it when the ball dropped nicely for Iliman Ndiaye six yards out, but defender Tosin Adarabioyo made a tremendous block as Chelsea took a disappointing point back home to London