Chelsea have opened talks with Bundesliga strugglers Hamburg over a potential summer deal for Hakan Calhanoglu but are yet to reach a deal over how much the Turkish wonderkid is worth, according to the Daily Mail.
Calhanoglu has been hugely impressive for Hamburg this season, with the 20-year-old scoring an impressive 10 goals from an advanced midfield position.
Mourinho is desperate to add extra creativity to his Chelsea squad this summer and believes that Calhanoglu fits the bill as a strong long-term investment, sanctioning Blues to make contract with Hamburg and begin preliminary negotiations.
Hamburg's valuation of one of Europe's most promising young stars could prove to be a problem though, rating the versatile playmaker as worth at least £12m.
Chelsea believe the midfield maestro should command a fee much closer to £7m and have financial fair play in mind plan as they plan to be more prudent with their spending this summer, with tentative early negotiations proving unsuccessful for the Premier League giants.
Calhanoglou's desire to leave Hamburg for a club in England could prove decisive in getting Chelsea over the line ahead of continental rivals in the race for his signature, with the Mail reporting that the Turkish international has instructed UK-based agent Muzzi Ozcan to get a deal done this summer.
The Blues have tough decisions to make in midfield this summer and will now factor Calhanoglou into that process, with veteran Frank Lampard still waiting on a contract offer and the long-term futures of both David Luiz and Jon Obi Mikel still to be determined.