Royale Union Saint-Gilloise, commonly referred to as Union Saint-Gilloise and abbreviated as RUSG, is a Belgian professional football club originally located in the municipality of Saint-Gilles, in Brussels, although since the 1920s, it has been based at the Joseph Marien Stadium in the neighbouring municipality of Forest. The club is one of the most successful in the history of Belgian football. The club won eleven Belgian championships between 1904 and 1935, making it the most successful Belgian club before World War II.
Jordy Croux is a Belgian professional footballer who plays as a winger for Japanese club Júbilo Iwata.
Christian Albert Elliot Burgess is an English professional footballer who plays as a centre-back for Belgian Pro League club Union Saint-Gilloise.
Felice Mazzù is a Belgian professional football manager who is the head coach of Sint-Truiden.
Thomas Didillon-Hödl is a French professional footballer who plays as a goalkeeper for Dutch Eredivisie club Willem II.
Bryan Heynen is a Belgian professional footballer who plays for Belgian club Genk. He plays as a midfielder.
Jonas Valentin Bager is a Danish professional footballer who plays as a centre-back for Allsvenskan club IFK Göteborg.
Dante Vanzeir is a Belgian professional footballer who plays as a forward and winger for Major League Soccer club New York Red Bulls and the Belgium national team.
Kōki Machida is a Japanese professional footballer who plays as a centre-back for Belgian Pro League club Union SG and the Japan national team.
Leonardo Miramar Rocha is a Portuguese professional footballer who plays for Polish club Radomiak Radom as a forward.
Anouar Ait El Hadj is a Belgian professional footballer who plays as a midfielder for Union SG in the Belgian Pro League.
Rasmus Carstensen is a Danish professional footballer who plays as a right-back for 2. Bundesliga club 1. FC Köln.
The 2021–22 Belgian Pro League was the 119th season of top-flight football in Belgium. Club Brugge completed their first league Championship hat-trick since the 1970s by edging out long-time leaders Union Saint-Gilloise, who had led for 200 days until losing twice to Club in the title play-offs. Had Union achieved their unlikely success, they would have been the first newly promoted side to win the Belgian League, and the first to claim a top-20 ranked European league since FC Kaiserslautern's 1997–98 Bundesliga triumph in Germany.
Malik Leon Tillman is a professional soccer player who plays as an attacking midfielder for Eredivisie club PSV. Born in Germany, he represents the United States national team.
Casper Mikael Terho is a Finnish professional football player who plays for Belgian Pro League club Royale Union Saint-Gilloise and the Finland national team.
Ilyes Ziani is a professional footballer who plays for Challenger Pro League club RWD Molenbeek. Born in Belgium, he is a youth international for Morocco.
Bilal El Khannouss is a professional footballer who plays as an attacking midfielder for Premier League club Leicester City. Born in Belgium, he plays for the Morocco national team.
The 2022–23 season was the 125th in the history of Royale Union Saint-Gilloise and their second consecutive season in the top flight. The club participated in the Belgian Pro League, Belgian Cup,UEFA Champions League and UEFA Europa League.
Amine Et-Taïbi is a Belgian footballer who plays as a centre-back for Belgian First Division A club Club Brugge. Born in Belgium, he is a youth international for Morocco.
Mike Louis Penders is a Belgian professional footballer who plays as a goalkeeper for Genk. He will join Premier League club Chelsea in July 2025.
