Tuesday's game will be a test of Arsenal's squad depth, then. The Gunners have been going well in the last couple of weeks while their trio of Australia internationals have been away and they also won at the weekend and kept a clean sheet despite Williamson missing out.
Stars such as Alessia Russo, who has 21 goals and assists this season, and Mariona Caldentey,runner-up in last year's Ballon d'Or vote, headline a squad that still has plenty of quality as Arsenal look to defend their Champions League crown, with England international Lotte Wubben-Moy and Spain's Laia Codina likely to make up the centre-back positions with Williamson unavailable. Wubben-Moy has won two European Championship titles with England, while Codina was part of the Spain side that beat the Lionesses in the 2023 Women's World Cup final. Both have plenty of experience of these big games.
The Gunners were somewhat surprise winners of the Champions League last season, when they beat three-time champions Barcelona in the final. Prior to that, they completed two incredible comebacks, first in the quarter-finals, to beat Real Madrid after losing the first leg 2-0, and then in the semi-finals, thrashing eight-time winners Lyon 4-1 in France. But Arsenal will certainly not be underestimated by anyone now after that accomplishment and will fancy their chances at retaining the crown, given what they showed last season, even if absences like that of Williamson will make tomorrow's game that much harder.