Galatasaray suffered a 0–1 defeat to Union St. Gilloise on Tuesday, 25 November 2025, in Matchday 5 of the UEFA Champions League League Stage. The match kicked off at 17:45 UTC under the supervision of Spanish referee José María Sánchez Martínez. The two sides went into the break level at 0–0, but a second-half goal decided the contest in favour of the Belgian visitors.

The result left Galatasaray in a precarious position midway through the league phase. With only two matches remaining in the g...