Arsenal look destined to perish at the same stage of the Champions League and against the same opponents as last season after Bayern Munich won convincingly at Emirates Stadium. Pep Guardiola's side remain on course in their bid to become the first side to retain the Champions League as second-half goals from Toni Kroos and Thomas Muller gave them an emphatic advantage in their last-16 first-leg tie. David Alaba was also wasteful as he hit the post from the resulting penalty - but there was no escape for 10-man Arsenal after the break as Bayern's greater numbers and quality proved decisive.