Ake and Koulibaly are officially at Stamford Bridge now and it looks like the rumors about Kimpembe and Kounde will end with these two defenders.
Yes, Chelsea doesn't need more center-backs now since they already signed Ake and Koulibaly. They should end the negotiation to sign both Kimpembe and Kounde. These center-backs are expensive, Chelsea mustn't want to waste money because they are not urgent to buy more center-backs. I believe Chelsea management focuses on looking for a new CF. They need at least 1 top CF after Lukaku left the club. Lately, there is a rumor that they are trying to sign CR7 or Lewandowski.