Union Saint-Gilloise won 3-0 away to Viktoria Plzeň on the opening matchday of the Europa League, at the Doosan Arena. Relebohile Mofokeng scored in the 16th minute, Mateo Biondic added a second in the 42nd and Ondrej Kricfalusi made it three in the 58th, with Massiré Sylla, Louis Patris and Besfort Zeneli providing the respective assists.
Union had 22 attempts to Plzeň's 14 and put 13 on target to their hosts' five. Plzeň made ten saves to Union's four, while Plzeň won five corners to one. Possession was close, 51% to Union and 49% to Plzeň.
Each side had two players booked. Kricfalusi went into the book in the 15th minute for time wasting and Biondic in the 41st for a foul; Plzeň's Patrik Hrosovsky followed in the 44th and Stefan Pirgic in the 59th, both for fouls. There were no red cards. Plzeň made five substitutions, two in the 45th minute, two in the 63rd and one in the 71st; Union made five between the 62nd and 82nd minutes.
The result puts Union fifth in the league phase with three points and a goal difference of plus three. Plzeň are 34th with no points and a goal difference of minus three.