What Kalidou Koulibaly did to Nicolas Pepe to inspire rare Chelsea positive in Arsenal defeat
It's safe to say Kalidou Koulibaly made a positive first impression in Chelsea colours, even as the Blues fell to a comprehensive defeat to Arsenal. In a match dominated by the difference in intensity and match-readiness between the two London sides, the Senegal international still managed to highlight what he could have to offer over the course of his four-year contract.


