Partizan made life difficult for Manchester United on Thursday evening, but the Red Devils managed to beat the Serbian side 1-0 and grab the three points.
Anthony Martial converted from the spot just before half time to give his team their first win after six matches without a win.
A great Sergio Romero save in the second half prevented Partizan from equalising as the Argentine managed to keep a clean sheet in Belgrade.
Since the arrival of Ole Gunnar Solskjaer, Manchester United have been awarded more penalties (14) than any other Premier League club in all competitions.
Nevertheless, the Red Devils top their Europa League group with seven points after three games into the competition.