Chelsea's hopes of landing Bayer Leverkusen forward Andre Schurrle are hanging by a thread as Blues starlet Kevin De Bruyne is relectant to join Leverkusen as part of the player-plus-cash agreement.
The Daily Mirror reports the Belgian international is instead holding out for a move to Borussia Dortmund - who have identified Chelsea's De Bruyne as a potential Mario Gotze replacement for next season.
Gotze has agreed a deal to play for Bayern Munich next season, and Dortmund are believed to be considering using part of the Gotze windfall to splash out £15m on De Bruyne.
De Bruyne has never played for Chelsea - he was immediately loaned to Werder Bremen at the beginning of this season after he signed for £7m from Genk.
But he's impressed in the Bundesliga for Bremen. The German side are hovering dangerously over the relegation zone, but De Bruyne has been a rare bright spark, scoring six goals and providing a team-high nine assists.
The report claims Chelsea are waiting for the Belgian to make up his mind, and would be willing to accept a £15m cash bid for the 21-year-old.
But selling the midfielder to Dortmund would throw a spanner in the works of the Schurrle deal. Earlier reports had claimed Leverkusen were keen to bring in a direct replacement for Schurrle, and had their eye on De Bruyne.
Leverkusen's sporting director Rudi Voller confirmed this week the club are looking to get the best deal for their Germany international forward, and De Bruyne is indeed under consideration.