Atletico Madrid striker Costa has a number of clubs thought to be after his services this summer, following a phenomenal campaign in the Spanish capital.
In 32 La Liga starts this season, Costa has netted 27 goals – falling just three short of Cristiano Ronaldo’s current league total.
Chelsea are known to be interested in the Brazilian star, with recent reports in the Spanish press suggesting the Blues already have a €60m agreement in place to sign the striker - although the fact that nothing has been confirmed is encouraging other clubs to continue to mull over making bids.
According to The Mirror, Chelsea's London rivals Arsenal have identified Costa as a possible strike partner for Olivier Giroud, and Arsene Wenger's side are thought to be contemplating meeting the alleged £31m release clause in Costa's contract and making a significant bid.
Arsenal have been over-reliant on French international Giroud this season, with the inexperienced Yaya Sanogo and the out-of-favour Nicklas Bendtner the club's only other viable options. And Wenger admitted in last week's press conference that Arsenal needs to beef up in the striking department, saying: 'There is perhaps room for an attacking player who can play in a different position to Giroud. Someone who can play with him as well. But I do not know yet who will be on the market'.
The Diego Costa transfer saga has been long ongoing, although the player has told Spanish media outlet AS that he is, in fact, happy at Atletico Madrid. With a likely La Liga winners medal and a Champions League final to come later this month, even the financial clout of Chelsea and the draw of playing for a talented Arsenal side might not be enough to encourage him to move on in the summer.