A controversial second-half penalty from Antoine Semenyo was enough to hand Bournemouth a 2-1 victory against Brighton.
The Ghanaian was able to notch his third goal of the season from the spot after Evanilson went down under a challenge from Jan Paul van Hecke that seemed to have minimal contact as the Brazilian dropped to the floor.
The Cherries dominated for large portions of the contest, but needed a slice of fortune in both their goals to topple Fabian Hurzeler's depleted Seagulls.
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The visitors were impacted by injury from the get-go, with Jack Hinshelwood forced off in the opening two minutes, before Alex Scott fired the hosts ahead while Maxim De Cuyper was off the pitch having been barged into the advertising board just moments earlier.
The visitors looked disjointed for the remainder of the first-half, but came out the blocks firing in the second. Their most consistent threat was Yankuba Minteh, and it was the 21-year-old who was at the heart of Brighton's equaliser.
The winger delivered a teasing cross to the back post which left Petrovic in no man's land and allowed Kaoru Mitoma to head into an empty net from close range.
The parity didn't last long though, as less than 15 minutes later, Semenyo was on hand to roll home from 12 yards to secure the victory.
Dean: Penalty decision 'a poor call'
Ex-Premier League referee on Soccer Saturday:
"I can't see it. He's dangled his leg and pulled it away. He might just have brushed his shin as he's pulled it back.
"I just don't think it's enough for a penalty.
"Because there's a tiny bit of contact, they're going to go on referee's call. I think it's a poor on-field call."