Rayan had a special reason to savour Bournemouth's 3-0 victory over Manchester United at Old Trafford, having grown up supporting the club he helped defeat.
The Brazilian forward opened the scoring in the October meeting, with Marcus Tavernier and Evanilson completing a convincing away win. It was an unusual occasion for the 20-year-old, who had previously followed United because of his admiration for Cristiano Ronaldo.
During an interview with ESPN Brazil alongside Bournemouth team-mate Evanilson, Rayan was asked about the experience of winning at Old Trafford.
"Yeah, it's true, that's exactly how it feels. I was even talking to the people at home, my wife and the people who are with me, and I told them I've always supported Manchester United here in England," he said.
Asked to confirm that United really had been his preferred Premier League side, he replied: "Yes, really."
His explanation was straightforward: "Because of Cristiano Ronaldo."
The result therefore carried an extra significance for the former Vasco da Gama player, who had the opportunity to score against a club he had admired from afar.
"Then I said, 'Wow, we've beaten Manchester United, the team I've always supported,'" Rayan recalled.
Evanilson pointed out that Bournemouth had achieved the victory away from home, making the occasion even more remarkable.
"But it's there, too. At Old Trafford, which was a dream of mine to play at. It was a dream come true," Rayan said.
The Brazilian was also struck by the experience of entering the stadium and stepping onto the pitch, having previously imagined what it would be like to play at the famous ground.
Asked whether he thought about Ronaldo when he first walked into Old Trafford, he replied: "Yes, yes, yes, I remembered him."
He added: "I wanted to go in just to see what it was like, to see what the stadium was like, to step onto the pitch."
There was also a light-hearted exchange about the age of the stadium, with Rayan acknowledging that it looked old before Evanilson defended its appearance.
The forward was happy to agree with his team-mate, describing Old Trafford as "still brilliant".
Rayan's goal helped Bournemouth secure their third consecutive 3-0 victory at Old Trafford, following the same scoreline on their previous two visits. The result was another notable moment in the young forward's adaptation to English football after his move from Vasco da Gama.
There had previously been reported Manchester United interest in the Brazilian while he was still at Vasco, although the club did not follow that up with an offer before Bournemouth secured his services.
For Rayan, however, the October fixture offered something beyond the satisfaction of an impressive away win: the chance to score at the home of the team he had supported since childhood.