Costa wanted to leave Chelsea in summer

Football Soccer - Arsenal v Chelsea - Barclays Premier League - Emirates Stadium - 24/1/16 Chelsea's Diego Costa goes down resulting in Arsenal's Per Mertesacker being sent off Reuters / Dylan Martinez Livepic EDITORIAL USE ONLY.

Chelsea striker Diego Costa has said he wanted to leave the club in the summer. Costa joined the Blues for £32m in 2014, and was understood to be close to a return to former club Atletico Madrid after a difficult 2015-16 campaign.

The Spain international has since scored 14 Premier League goals, as Chelsea have taken a six-point lead courtesy of 13 successive victories. "Did I want to go? Yes, yes, I was about to leave.

But not because of Chelsea," said the 28-year-old. "There was one thing I wanted to change for family reasons but it wasn't to be, and I continue to be happy here."

Costa scored 20 goals in his first season in England, as Chelsea won the Premier League title under Jose Mourinho. But he had netted only four more by the time Mourinho was sacked in December 2015, finishing the season with 12 before being heavily linked with a move.