SAINT-ETIENNE, France - Jose Mourinho said on Thursday he is concerned about how many air miles Manchester United is wracking up as it continues to battle on four fronts.

Henrikh Mkhitaryan scored the only goal of the game at Saint-Etienne on Wednesday after 16 minutes to kill off any suspense in United's Europa League last-32 tie, which it won 4-0 on aggregate.

United needs to negotiate three more two-legged ties to reach the final in Stockholm on May 24, but Mourinho's biggest worry is how far his team must travel, given it will mostly be playing twice a week until the end of the season as the battle for a top-four Premier League finish shares the spotlight with runs in three cup competitions.