Here are the official starting lineups for both Athletic Club Bilbao and Arsenal F.C for their Champions League Round 1 (league phase) clash on September 16, 2025 at the San Mames Stadium (official crowd attendance of 51.059). Arsenal beat Athletic Club 2:0.

Athletic Bilbao vs Arsenal FC 0:2 starting lineups and subs UCL 2025

Unai Simon

Gorosabel, Vivian, Aitor Paredes, Boiro (Berchiche 68)

Jauregizar, Vesga (Rego 81)

Berenguer, Sancet (Guruzeta 68), Robert Navarro (Unai Gomez 61 | Serrano 81)

Inaki Williams

Arsenal FC starting lineup vs Athletic Bilbao FC Champions League September 2025

Raya

Timber, Mosquera, Gabriel Magalhaes, Calafiori (Hincapie 90+1)

Merino, Zubimendi, Rice

Madueke (Norgaard 90+1), Gyokeres (Trossard 65), Eze (Martinelli 71)

Athletic Bilbao vs Arsenal FC 0:2 Match Timeline 25-26

0:1 Gabriel Martinelli goal 72
0:2 Leandro Trossard goal 87

Arsenal had 62% possession vs Athletic Bilbao in this September 2025 Champions League win, although both teams had the same number of total shots (11 each).