Hummels tells club of desire to join Bayern Munich this summer

Borussia Dortmund is on the verge of losing yet another star to its biggest rival after announcing centre-back Mats Hummels has expressed his "desire" to leave this summer with hopes of joining Bayern Munich.

In a statement, Dortmund confirmed it has yet to receive an official offer from Bayern, adding that Hummels does not have a release in his current deal - which is set to expire in 2017.

"The player Mats Hummels informed Borussia Dortmund that he wishes to leave the club in order to join FC Bayern Munich with effect from the 2016/2017 season," the statement read.

"Against this background the management of Borussia Dortmund has decided that the realization of such a transfer shall depend on the condition that Bayern Munich provides Borussia Dortmund with an extremely valuable offer which reflects the high importance of the player in soccer and other terms for Borussia Dortmund.

"At present no offer at all has been made by Bayern Munich yet."

If a transfer comes to fruition with Bayern, Hummels will rejoin the club he joined in 1995 as a 6-year-old. He progressed through the academy before eventually playing his first senior match, but a loan spell with Dortmund eventually saw him join BVB on a permanent basis.

A transfer this summer would also continue the trend of players leaving Dortmund for Munich, following the departures of Mario Gotze (2013) and Robert Lewandowsi (2014).

Since joining Dortmund, Hummels has helped the club win the Bundesliga title twice before guiding the club to the Champions League final in 2013, where, of course, Bayern Munich came out victorious.