Arsenal's slim Women's Super League title chances were effectively ended as 16-year-old substitute Issy Hobson's stoppage-time equaliser earned Everton a 1-1 draw at Walton Hall Park.
Alessia Russo had put the third-placed Gunners ahead 10 minutes from time, slotting in the follow-up after Toffees goalkeeper Courtney Brosnan had blocked Beth Mead's shot with her leg.
But the hosts equalised through Hobson in the fifth added minute, the teenager nodding the ball past Gunners keeper Manuela Zinsberger to become the youngest goalscorer in WSL history.
The draw left Jonas Eidevall's side, with two games left to play, five points behind leaders Manchester City, ahead of the table-toppers' trip to Bristol City.
Leicester 0-1 Manchester United
Ella Toone's stunning late winner gave fourth-placed Manchester United a 1-0 victory at Leicester.
Toone came off the bench to settle a contest that United had enjoyed the better of seven minutes from time.
Yuka Momiki had hit a post for the visitors before Toone found the top corner of the Leicester net from long range.
Tottenham 1-1 Brighton
Brighton drew 1-1 at Tottenham, with Bethany England salvaging a point for the FA Cup finalists.
Elisabeth Terland's 13th goal of the season, poking home the rebound after Spurs goalkeeper Rebecca Spencer had kept out her initial header, put the Seagulls ahead after 17 minutes.
But England turned home substitute Ashleigh Neville's cross to level nine minutes from time.
Aston Villa 1-1 West Ham
Alisha Lehmann struck against her former club - and against the run of play - to put Villa ahead after 72 minutes.
The Hammers equalised in the fifth minute of stoppage time when Shannon Cooke met Riko Ueki's centre and the ball trickled through the legs of Villa goalkeeper Sophia Poor.
Palace went into the final day of the campaign three points clear of second-placed Charlton with an an overwhelming advantage in goal difference, and a goalless draw against Sunderland in front of a club-record 6,796 crowd at Selhurst Park sealed top place.