Kostoulas netted with a brilliant overhead kick in stoppage-time at the Amex Stadium after Bournemouth had led through Tavernier’s dubious first half goal.
Bournemouth had taken the lead in the south-coast derby when referee Paul Tierney overturned his decision to book Amine Adli for diving after a challenge from Brighton keeper Bart Verbruggen.
VAR official Jarred Gillett told Tierney to consult the pitch-side monitor and the referee agreed to rescind the yellow card, awarding a spot-kick that Tavernier converted.
But just as Bournemouth were closing in on their first win on the road in 10 matches in all competitions, Greek teenager Kostoulas came to the rescue with his second goal since signing from Olympiakos in July.
Bournemouth have now conceded 12 goals in the last 15 minutes of the second half – no team has allowed more in the Premier League this season.
Kostoulas’ dramatic leveller kept Brighton three points ahead of Bournemouth in mid-table. (AFP)
