A Martial penalty is the difference between the two sides at the break. Miletic fouled Williams and the referee pointed to the spot immediately - and Martial made no mistake. United can count themselves lucky to be in front though, as they've been poor. Time and time again they've gifted possession to their hosts, with Sadiq hitting the post and Asano shooting just wide. United did hit the post themselves - Lingard with the effort - and McTominay missed an excellent chance beforehand.
This is the first time Partizan have played Manchester United in 53 years! The only previous game between the two was in the semi-final of the 1965-66 European Cup - Partizan went on to reach the final, a 2-0 home win offsetting a 1-0 away defeat.