By Samuel Meade Arsene Wenger beamed about the “serene atmosphere” he had at Arsenal while he watched Liverpool try and keep Philippe Coutinho back in 2017. The Brazilian had become the headline act at Anfield since joining in 2013 and continued to underline his brilliance with consistent performances under Jurgen Klopp. In just his second full season though the German faced the prospect of losing his playmaker, who wanted to move to Barcelona. Coutinho wanted a move to one of Spain’s giants and was left out of Liverpool’s opening games in the 2017/18 season as they dealt with the speculation,…