Substitute Andriy Yarmolenko marked a rare West Ham United appearance with a dramatic late goal to earn his side a priceless 3-2 Premier League win over Chelsea on Wednesday.

The Ukrainian, who made his first appearance in six months as a late substitute in their 2-0 defeat by Wolves, was introduced in the 78th minute with a topsy-turvy derby on a knife edge at 2-2.

With Chelsea pushing for a late winner, West Ham counter-attacked and Pablo Fornals played in Yarmolenko who cut inside Antonio Rudiger before sliding a shot past Kepa Arrizabalaga.

There were no West Ham fans inside the London Stadium but the joyful roars of the players bellowing around the empty arena showed exactly what this victory meant.

A terrible error from goalkeeper Tim Krul gifted Pierre-Emerick Aubameyang his 50th Premier League goal as Arsenal thumped Norwich City 4-0 at the Emirates, pushing the Canaries ever closer to relegation.

Krul foolishly attempted to fake a long kick and dribble past the Gabon striker in the 33rd minute, but he nicked the ball off the keeper's foot and rolled it into the net to reach a half-century of goals in the English top flight.

The Gunners scored a brilliant second four minutes later as David Luiz started an attack with a superb cross-field ball to Kieran Tierney. His pass found Aubameyang, who teed up Granit Xhaka to score with a sweet first-time shot.

Meanwhile, third-placed Leicester City's winless run since the restart of the Premier League season continued with a 2-1 defeat by Everton at Goodison Park.

Leicester stayed on 55 points, one more than fourth-placed Chelsea who play West Ham United later on Wednesday.

Everton moved up to 11th on 44 points and they are unbeaten in nine Premier League matches at Goodison Park – seven of those since Ancelotti took over as manager.

Elsewhere, Alexis Sanchez produced an imposing performance to inspire Inter Milan to a 6-0 win over Serie A strugglers Brescia at San Siro.

Sanchez scored for Inter for only the second time but helped set up other goals as they consolidated third place in Serie A on 64 points and moved closer to a berth in next season's Champions League.

Brescia slipped to the bottom of the table on 18 points, eight adrift of the safety zone, and will need a dramatic turnaround in fortunes in their remaining nine games if they are to avoid an immediate return to Serie B.