Chelsea manager Thomas Tuchel is still looking to sign another central defender and striker for his squad. Three senior players have been added so far this summer at Stamford Bridge: Marc Cucurella, Kalidou Koulibaly and Raheem Sterling, while Pierre-Emerick Aubameyang continues to be linked with a move from Barcelona. Ad While Koulibaly arrived from Napoli, the departures of Antonio Rudiger and Andreas Christensen means that the squad are light in the middle of defence, especially with Levi Colwill’s loan move to Brighton.