By Andy Dunn When John Stones lifted the European Cup in Istanbul last June, he banished the memory of one half of the most painful summer of his footballing career. In Berlin in early July, he is determined to get rid of the memory of the other half. In 2021, Stones suffered thedisappointment of losing a Champions League final to Chelsea in Porto and a Euro final to Italy at Wembley. “After the Euros final was a difficult, really difficult, point for me,” admits Stones. “Losing a Champions League final and losing that, was difficult to take. “After that, I said to myself that I never wanted t…