Kalidou Koulibaly will not be enough on his own to fix the issues currently at Chelsea.
This was evidenced with the 4-0 loss against Arsenal in pre-season. Despite only featuring in the second half, the Senegalese defender was on the pitch when Albert Sambi-Lokonga scored unmarked at the back post. With Cesar Azpilicueta and the back four formation largely blamed for the four goals conceded, Chelsea's new £34million signing was the only member to come out of the contest against their London rivals largely unscathed and this was reflected by Thomas Tuchel's assessment of his second new summer recruit.
"He was the best player on the pitch for us," he said in his post-match press conference on Saturday. Jules Kounde was odds-on to join Koulibaly in forming the new foundation of Tuchel's defensive set-up to compensate for the already gone Antonio Rudiger and Andreas Christensen but just like the pair, the Frenchman is set to end up in La Liga as Barcelona and Sevilla negotiate the final details.