Borussia Dortmund extends key players. The club re-signs important players. Find all transfer news here. The first clubs set the tone for the new season. Here you will find all relevant transfer news from the 1st and 2nd Bundesliga as well as from international top clubs. Bayer 04 extends with Onyeka. The 20-year-old midfielder extends his contract until 2028. Elversberg signs Onyeka. The 20-year-old midfielder moves to Elversberg. Cottbus re-signs Bittencourt. The 25-year-old striker moves to Cottbus. The club re-signs important players. Find all transfer news here.