Diego Costa is set to be rewarded with a lucrative new deal for transforming his Chelsea career.

The Spain striker was close to leaving Stamford Bridge in the summer after struggling last season. But his 13 goals in this campaign have shot Antonio Conte’s side to the top of the Premier League table and Costa is in line for a bumper pay rise.

Chelsea want to offer the 28-year-old a two-year extension to his deal that expires in 2019. He is currently paid £150,000 a week, but can expect a significant upgrade on that figure if he agrees fresh terms.

Diego Costa has scored 13 goals in the Premier League for Chelsea so far this season

Costa has found a new lease of life under Conte and is understood to be far happier in London. The combative forward was angling to return to Spain last season, with a move to former club Atletico Madrid mooted.

But his explosive recent form has effectively ended talk of an imminent transfer to La Liga.

Costa has started every Premier League game for Chelsea this season but must sit out the Boxing Day match against Bournemouth through suspension. Michy Batshuayi is expected to deputise.

Costa scored the winner in Chelsea's 1-0 win over struggling Crystal Palace on the weekend

Meanwhile, Chelsea target Leonardo Bonucci has extended his contract with Serie A champions Juventus until 2021.

The 29-year-old Italy defender — who has won five Italian titles with Juve, three under the management of Conte — had also been linked with Manchester City.

Bonucci tweeted: ‘I’ve chosen to stay at a place where I’ve become a great among greats.’