Pep Guardiola felt his team were given a useful test after coming from behind to begin their Champions League defence with a 3-1 win over Red Star Belgrade. The holders were stunned when the Serbian champions claimed a shock lead on the stroke of half-time through Osman Bukari in Tuesday’s Group G clash at the Etihad Stadium. Yet as they did in the Premier League at West Ham last weekend, they hit back to win after the break, this time with two goals from Julian Alvarez and one from Rodri.