Everton were furious after Brighton’s Kayleigh Green escaped being sent off despite being booked twice.
Referee Lucy Oliver — wife of Premier League ref Michael — showed Green a second yellow card in the 80th minute but failed to display a red.
Everton boss Willie Kirk said: ‘It shouldn’t happen. The player knew. She was not wanting to go near the referee.’
An investigation at Arsenal as yet another injury crisis hits. Seven players are sidelined, making it the third year in a row that the Gunners have suffered this kind of problem.