Costa goal takes Chelsea past Arsenal

Football English Premier League

 Arsenal missed out on the chance to regain top spot in the Premier League after losing 1-0 at home to London rivals Chelsea on Sunday.

Meanwhile, Swansea gave new coach Francesco Guidolin victory in his first game in charge with a 2-1 win away to Everton as the Welsh club moved four points clear of the relegation zone.

At the Emirates, Arsenal were reduced to 10 men in the 19th minute when Per Mertesacker was sent off for a challenge on Chelsea striker Diego Costa, with referee Mark Clattenburg ruling the Gunners defender was the last man.

Four minutes later, Costa gave Chelsea the lead when he got on the end of a Branislav Ivanovic cross at the near post.

Arsenal's defeat left them in third spot, three points behind shock leaders Leicester City, while Chelsea moved up into 13th place.

A hard-fought victory at Goodison Park saw Italian boss Guidlolin off to a winning start with the Swans.

Swansea went ahead though Gylfi Sigurdsson's 17th-minute penalty but Everton were level nine minutes later when Gareth Barry's near-post flick was turned into his own net by the Swans' Jack Cork.

But Swansea regained the lead in the 34th minute. Left-back Neil Taylor burst clear and released Andre Ayew, whose shot deflected in off the sliding John Stones.

This was a notable win for Swansea as it meant they had recorded back-to-back league successes for the first time this season following last week's 1-0 defeat of Watford. It was also their first league victory over Everton.

"Six points in two matches is very important for us because the table was not good," said Guidolin. "I hope to have the possibility to go up in the table.

"In this moment I am very happy. This is the first match in the Premier League for me."

Aguero shines

Sergio Aguero kept Manchester City in touch with leaders Leicester as the Argentina striker's late equaliser rescued a 2-2 draw against West Ham on Saturday.

Manuel Pellegrini's side trailed twice to an Enner Valencia double at Upton Park, but Aguero bagged a brace to save City from a defeat that would have been a major blow to their title challenge.

Aguero's second goal came with just 10 minutes remaining and left City three points behind surprise pace setters Leicester in second place.