Chelsea target Ousmane Dembele was spotted in London, and Bissouma joined Tottenham Hotspur.
The European, Chelsea, Spurs and others transfer window is now officially open, and as expected, top European clubs are scrambling to get their deals completed as soon as possible, with pre-season preparations just around the corner.
Real Madrid, the defending UEFA Champions League champions, have already strengthened their midfield with the signing of Tchouameni Aurelien from Monaco, who has now passed his medical and officially signed with the Santiago Bernabeu giants.
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In England, Tottenham Hotspur surprised everyone by signing midfielder Bissouma from Brighton and Hove Albion, while Darwin Nunez arrived at Anfield to complete his long-awaited transfer to Liverpool.