Chelsea are set to intensify their pursuit of Atletico Madrid striker Diego Costa with Wayne Rooney set to ink new terms with Manchester United.

The Daily Star says Jose Mourinho had been keen on Rooney but will now try to make a move for Costa in the summer.

Costa has been watched by Chelsea for months and they lodged a fresh inquiry this week, according to reports.

The Atletico Madrid star, who has interested Arsenal, has a £32m buyout clause in his contract. United have also cast a look at him while Liverpool had a summer bid rejected.

A possible deal could be pushed through by Jorge Mendes, who is the agent for both Mourinho and Costa.

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