Alessia Russo scored on her 100th Women's Super League appearance as Arsenal beat Everton at Goodison Park to move second in the table.
The England striker diverted captain Kim Little's volley goalwards with her chest to put the visitors back in front in fortuitous fashion in the 15th minute.
Everton goalkeeper Courtney Brosnan had tried in vain to keep Russo's unwitting finish out with it later confirmed that Russo's effort had crossed the line. Caitlin Foord had slammed home the rebound from two yards in any case.
Second-half substitute Olivia Smith made the points safe late on, hitting a volley from 25 yards that bounced over the flailing arm of Brosnan.
Arsenal had dominated proceedings straight from kick-off, and their early pressure was rewarded after 11 minutes. Katie McCabe strode on to Rion Ishikawa's superb goalline clearance at the edge of the box to loop a half-volley across goal and into the far corner.
Yet with the Gunners' jubilation still fresh in the air the hosts equalised.
Honoka Hayashi, the match-winner against Chelsea last weekend, drove forward from midfield, before curling high into the top corner from distance.
Everton's celebrations were also short-lived though, as Arsenal re-established their lead through Russo moments after the restart to complete a four-minute goal flurry.
The Toffees had Brosnan to thank for remaining a sole goal down at the interval, with the highlight of her stream of late first-half stops a springing save to her left to deny Russo a second goal.
The second half played out in the same manner as the first, with Everton pinned inside their defensive third by a relentless Arsenal attacking effort, before Smith quelled any fears of an Everton fightback.
The standout moment in an otherwise tame half was the introduction of Leah Williamson to play her first minutes of the season following a four-month absence through injury. The England captain had not played since the Lionesses' Euro 2025 final triumph against Spain in July.
The defeat leaves Everton ninth in the table as they close out the first half of the season without winning a single point at home.