As he walked the corridors of Old Trafford in the hour after the final whistle of an exhilarating Manchester derby, Aaron Wan-Bissaka got a sense of what Raheem Sterling must have felt during the previous 90 minutes of football.



Wherever Wan-Bisska went, he was shadowed — because he was among those selected for drug testing. He became the one chaperoned closely.



Such was his dehydration though, it was nearly 7.30pm before he could head back into the dressing room to change out of his kit having finally provided a sample.



“Everyone was buzzing but he and Fred, who was also tested, were wandering around in their kit with a pair of drugs testers following them,” says a source. “Despite leaving the ground late, he was really good with waiting fans, smiling for selfies.”



Around 24 hours later, Jamie Carragher was analysing Wan-Bissaka’s performance against City on Sky Sports’ Monday Night Football and hailing him...