By Grey Whitebloom During Mauricio Pochettino’s first summer as Chelsea manager, the Blues spent more than Tottenham Hotspur had across all 11 transfer windows during the Argentine’s spell in north London. Yet, Pochettino still isn’t satisfied by the club’s recruitment. Christopher Nkunku’s injury-plagued opening six months at the club has been a constant spoke in the wheel for Pochettino’s plans at Chelsea. As fears grew over the severity of Nkunku’s hip issue and with Nicolas Jackson away with Senegal at the Africa Cup of Nations, Pochettino wondered aloud whether Chelsea needed a new strike…