Chelsea had signed Kalidou Koulibaly from Napoli on a four years contract to replace Rudiger, the guy is a very solid and quality defender who will compliment Tiago Silva at Chelsea backline he is a perfect replacement, though he is 31 he is playing at the top level and one of the best centre back in Europe that is why he was signed for a four years contract despite being 31 while Tiago is 37, I believe the duo has the needed experience to assist Chelsea in their defence, hopefully he will settle down and adapt quickly before the commencement of the premier league in August 5.
Link:
https://www.bbc.com/sport/football/62168549I have just seen it on Transfermarkt yeah. I'm happy for their side honestly. This was their main issue in the end. In addition to this transfer I expect them to sign one more defender. They are still in talks with Manchester City for Nathan Ake now and maybe even Kounde can come too. Chelsea had better go for Kounde first if they really want him because Manchester City don't have interest in him as long as they keep Ake. However maybe they can give up on looking for another defender too while having Thiago Silva.