Chelsea swept aside Arsenal in an early heavyweight clash at Stamford Bridge, as Alyssa Thompson's first-half strike sealed all three points in an enthralling London derby.
The defeat ended a 20-game unbeaten run for the Gunners in the Women's Super League, leaving them seven points adrift of league leaders Manchester City who they face next.
Here's how it happened.
Chelsea began their campaign with a draw at home to Aston Villa, before resounding wins over Manchester United and Birmingham City in their next two matches.
The Blues made a winning start to their Champions League campaign midweek with a 1-0 win over Austria Vienna. However, it wasn't a convincing victory and their performance was another reminder that they remain a work in progress.
Saturday's clash marked the first time Katie McCabe came up against her former side following her high-profile move to Chelsea in the summer. Given her long association with Arsenal and the fiery tussles she was involved in against Chelsea, McCabe's transfer took the women's football world by surprise. The last time these two sides met in the league, she was sent off.
Arsenal have had a difficult start to the season, drawing two of their three league games this season. Further dropped points on Sunday could prove detrimental to their hopes of winning a first league title since 2019.
The Gunners have been painfully ineffective going forward and have scored just three goals in all competitions this season. They required an injury-time penalty to get past Champions League minnows HB Koge last week.