Rianna Jarrett's second-half strike was enough to earn Brighton a 1-0 win over West Ham in the Women's Super League.
Ireland international striker Jarrett lobbed West Ham keeper Mackenzie Arnold and then followed up to head home in the 69th minute.
Arnold denied Brighton, who also had Irish international Denise O'Sulllivan in midfield, a second minutes later pushing away an Inessa Kaagman shot from Kayleigh Green's cross.
West Ham squandered a good first-half chance when Martha Thomas' shot from the edge of the area was hit straight at Brighton keeper Cecilie Fiskerstrand, who had come off her line.
Hammers substitute Kenza Dali had two good long-range second-half efforts saved by Fiskerstrand as Brighton held on to claim their second WSL win of the season.
Chelsea maintained their 27-match unbeaten WSL run thanks to a late Lotte Wubben-Moy own goal in the 1-1 draw against Arsenal.
The Gunners missed the opportunity to go top of the table after taking the lead with just five minutes remaining.
Excellent work from Vivianne Miedema led to Beth Mead smashing the ball home in the 86th minute.
The visitors struck back just four minutes later as Pernille Harder's cross was deflected by Wubben-Moy and the ball looped into the back of the net.
The Blues had a glorious chance to settle the game late on as Sam Kerr raced through but her chipped effort rolled narrowly wide of the post.