Atletico Madrid and Chelsea will reportedly go head to head for the services of Hamburger SV midfielder Hakan Calhanoglu this summer.
The 20-year-old, who has scored 10 times this season, is widely regarded as one of the best midfield talents in the Bundesliga.
Despite recently extending his contract with Hamburg until 2018, it is understood that the Turkish international is keen to seek pastures new at the end of the season.
According to AS, Atletico are in the driving seat, but face strong competition from Chelsea, who are preparing a bid in the region of £12m.
Atletico and Chelsea will also meet in the semi-finals of the Champions League later this month.
