Last season's top scorer Ewa Pajor of Barcelona scored twice on the opening night, while Mariona Caldentey converted a late penalty to hand Arsenal victory. Barcelona and Lyon both opened with commanding victories, with the French giants winning 8-0 against Servette in Switzerland, and Barcelona coming from behind to win 5-2 against Paris FC.
Arsenal, who have been bullish in targeting trophies, had a narrow home win against Danish minnows HB Koge, but their expected goals tally of 1.93 does not tell the story of a performance that was dominant with the ball. Chelsea, on the other hand, had a promising attacking performance from the Blues, with summer signing Melvine Malard bright in her pre-planned 45-minute appearance, and Alyssa Thompson's electric display showcasing what she could offer in her second season at Stamford Bridge.
Manchester City, who exploited their absence from European competition to romp to the Women's Super League title last season, gave an immediate indication they belong at this level by recovering to draw 2-2 against Bayern Munich, with summer signings Beth Mead and Carlotta Wamser justifying their arrival at the champions with their first goals for the club. The Women's Super League clubs will face greater tests in the Champions League this season, and it remains to be seen if they are equipped to challenge.