Every transfer has a knock-on effect, with one departure usually leading to an arrival.
Chelsea's capture of Kalidou Koulibaly is no different. The 31-year-old defender leaving for the Blues has left a hole in the Serie A side's defence and one they need to fill.
Elsewhere, highly-rated defender Milan Skriniar could be set for a Barcelona switch after Paris Saint-Germain baulked at Inter Milan's asking price. La Liga giants are keen on the Slovakian after losing the race for Jules Kounde.
