Lewis Hamilton has officially lost the qualifying head-to-head to Mercedes after another disappointing Saturday at the Azerbaijan Grand Prix. Hamilton took P7, with George Russell two spots ahead in fifth. It was a familiar story for the seven-time world champion. Friday’s practice sessions looked promising as he set the second-fastest time in FP1 and the third-fastest in FP2. But if Mercedes made set-up changes overnight, they worked against him as he slipped to 10th in final practice. That proved to be a sign of things to come in qualifying. Hamilton struggled for pace over the course of the…