Arsenal last night exited the UEFA Champions League after losing 1-0 to Bayern Munich, with Kai Havertz starting up front for the Gunners. Having played in midfield on Sunday against Aston Villa, the Germany international returned to the centre-forward position with Gabriel Martinelli and Bukayo Saka completing the attack, though Arsenal were toothless in Germany. Havertz failed to create much whilst both Martinelli and Saka were on the end of criticism for their performances in Munich, with Bayern showing Arsenal what is needed to progress in the Champions League at this stage. And after full…