Union Saint-Gilloise are an old Belgian name with a very modern edge. Founded in 1897 and based at Het Joseph Marienstadion, they sit second in the Pro League during the 2026-27 season, with a 30-man squad averaging 24 years of age.
Their recent league form is strong: five wins and a draw from the last six, including a 5-2 home win over Cercle Brugge, a 5-0 win against Lommel, and away victories at Royal Antwerp, Charleroi and Beveren. That run reflects a side carrying threat in both settings rather than leaning solely on home advantage.
The numbers are pointed. Union are averaging 2.8 goals at home while conceding just 0.6, and their away output is even higher at 3 goals per match, with 0.8 conceded. Raul Florucz leads the scoring with nine goals, followed by Guilherme Smith da Silva Carvalho and Relebohile Mofokeng on five each.
Their season has also carried a European dimension, moving through Europa League qualifying after a Champions League third qualifying round involvement and into the Europa League league phase. Domestically, they have reached the Beker van België round of 16 and were finalists in the Super Cup.
For Celtic supporters, Union Saint-Gilloise profile as a well-organised, high-scoring Belgian side in good form, with enough European exposure to make them a serious and relevant opponent rather than a novelty.