Chioma Ubogagu scored twice against Sunderland to help keep Arsenal's Women's Super League title hopes alive.
Defeat ends Sunderland's Champions League ambitions, while a draw for leaders Chelsea on Sunday could put the crown almost out of the Gunners' reach.
Striker Ubogagu stabbed home the opener, only for Beth Mead to to round Sari Van Veenendaal for the equaliser.
Another close-range finish from Ubogagu made it 2-1 before Natalia Pablos curled in a third for Arsenal.
The WSL 1 title could be decided on Sunday if Manchester City fail to beat relegation threatened Bristol Academy and Chelsea overcome Liverpool away from home.
With a superior goal difference, ever a draw for the Blues could be enough to deny Arsenal the title even if the race goes to the final day next week.
Sunderland Ladies: Olsen, Holmes (Potts 83), Greenwell, Bannon, Williams, Furness, McDougall, Chaplen (Kelly 70), Ramshaw (Roche 83), Joice,Mead.
Substitutes not used: Wilson.
Arsenal Ladies: Van Veenendal, Scott, Stoney, Losada (Bailey 86), Natalia, Nobbs, Carter (Corredera 77), Ubogagu (Yankee 63), Williamson, Rose, Janssen.
Substitutes not used: Byrne, Simpson, Humphrey, Wubben-Moy.
Attendance: 1, 166
Referee: Martin Coy