Luis Suarez, Edouard Mendy, Kevin-Prince Boateng and 110 big transfers - in pictures

Clubs looking to bolster their squads before the transfer window shuts

Europe's football clubs have spent almost €2.5 billion ($2.9bn) so far in this transfer window with less than a week before it closes.

Perhaps the most mind-boggling was Barcelona's decision to let Luis Suarez leave for a direct rival for virtually nothing.

The Uruguayan striker said a tearful goodbye to Camp Nou but announced himself at his new club, Atletico Madrid, with two goals after coming off the bench in a 6-1 thrashing of Gimnastic.

Serial loan player Loris Karius will spend the new campaign at Union Berlin, while the much-travelled Kevin-Prince Boateng joined the AC Milan reunion at Serie B side Monza after signing from Fiorentina for an undisclosed fee.

Chelsea boss Frank Lampard moved quick to address his issues in goal after yet more unconvincing performances from Kepa Arrizabalaga by purchasing Edouard Mendy from French club Rennes.

The Senegalese, who not so long ago was out of work and queuing at the job centre, joined the West London club for a fee of £22 million.

To see a gallery of those who have moved from or been released by Europe's top leagues, click on the arrows or swipe.