Chelsea left-back Filipe Luis insists he does not want to leave the club despite struggling to earn a starting place.
Gerard Pique says Barcelona are prepared to lose Xavi in the summer as reports link the midfielder with a move to Qatar.
The 32-year-old defender spent two years with the Spanish outfit, but saw out the latter part of last season on loan at Russian club Anzhi Makhachkala.
It was the Bosnian international's third spell in Russia, having previously played for Torpedo Moscow and Lokomotiv Moscow.
Bayer, third in last season's Bundesliga, have moved swiftly to add Spahic to their ranks.