Kaoru Mitoma scored a late winner for the second game running as Brighton edged past Bournemouth at Amex Stadium.
Mitoma, whose stoppage-time goal earned victory over Liverpool in the FA Cup last weekend, steered a header past Cherries goalkeeper Neto with three minutes remaining to spark joyous scenes among the home supporters.
Deniz Undav should have put the home side ahead in the first half, shooting against the post from close range after being denied twice in quick succession by blocks from Chris Mepham and Neto.
Jefferson Lerma shot wide from Jaidon Anthony's cross as Bournemouth began to grow into the contest, but the hosts continued to carve out the better openings and twice went close through Danny Welbeck before half-time.
Billy Gilmour fired into the side-netting and Cherries debutant Antoine Semenyo had a shot blocked by the retreating Pervis Estupinan in a delicately poised second half, before Mitoma's late header broke the visitors' hearts.
Brighton manager Roberto de Zerbi left Moises Caicedo out of his starting line-up after the Ecuadorian midfielder's attempts to force a move away from the club during the January transfer window.
The Seagulls climb to sixth, while Bournemouth are 19th after Everton's victory over Arsenal in Saturday's early game.