Bournemouth have been warned that a deal to sign their top choice to replace Antoine Semenyo might be happening a year too early.The Cherries are in talks with Vasco da Gama over teenage winger Rayan Vitor and have made an opening offer, talkSPORT understands.Bournemouth are interested in a move for Vasco starlet RayanGettyVasco are looking to fetch €35million (£30m) for the 19-year-old, who is being eyed as the long-term replacement for Semenyo.However, talkSPORT’s chief football correspondent Alex Crook has revealed that Andoni Iraola’s side values him much lower.Ghana superstar Semenyo completed a £62.5m move to Manchester City this month, in what was a record sale for Bournemouth.Who is Bournemouth target, Rayan?Rayan is the latest jewel from the Vasco academy that has produced Romario, Chelsea’s Andrey Santos, and teammate Philippe Coutinho.He scored 14 league goals in Brazil’s top-flight, with one assist in 34 games as the club finished two points outside the relegation zone.The attacker has already hit the ground running in the first game of this year, scoring twice in a 4-2 win in the Campeonato Carioca.Is he the Semenyo replacement?“Yes and no,” South American football expert Tim Vickery told talkSPORT’s Hawsbee and Jacobs on Thursday. “He’s not direct. “He’s less of a winger, I think. He’s less of a fly-past people, but he is very promising.The Brazil U20 international is yet to earn a senior cap for his countryGettyFormer Liverpool star Coutinho has been mentoring Vasco’s latest academy starGetty“He was the big revelation of the Brazilian Championship last year. He’s a giant figure, a real strapping figure, left-footed. “Been playing almost all of his football wide-right, cutting in. But during the course of a very successful year, he ended up moving inside, playing at centre-forward.“Now, his back-to-goal game, I think, still needs a lot of work. He’s not the finished article.”Another potential transfer flop?Premier League clubs have become no strangers to taking an early punt on wonderkids from South America, with varied success.Chelsea have been told that £56m starlet Estevao Willian can reach Eden Hazard levels of stardom following his move from Palmeiras.Bournemouth are hoping to knock down Vasco’s £30m valuation for RayanGettyHis ex-teammate, Luis Guilherme, failed to enjoy the same success at the Blues’ London rivals, West Ham, after his £25m arrival in 2024.The 19-year-old was flogged to Sporting this month off the back of just 18 appearances for the Hammers, one start, and zero goals.Tottenham have also been burned in the case of Alejo Véliz, who joined Spurs from Rosario Central for around £13m in August 2023.The striker is now back on loan at the Argentinian side, having scored just one Premier League goal in eight appearances (all as a sub).Vickery, who publicly warned Tottenham about moving for Véliz too early three years ago, has now voiced similar concerns over Rayan.West Ham sold Luis Guilherme to Sporting this monthGettyTottenham have been desperate to recoup some funds for Alejo VélizGetty‘I’d just be a little bit worried’“I would be a bit worried about him moving now,” talkSPORT’s Vickery added on the latter. “I think he probably needs a little bit more.“I know that people around him and his club coach think he probably needs a little bit more before he moves. “We’ve seen the consequences of premature moves. The likes of Luis Guilherme at West Ham. Or Véliz at Tottenham, who is now negotiating with a Brazilian club.Bournemouth have been warned about the consequences of a premature transferGetty“I would be a little bit worried about him, although the promise is huge. And it seems that what Bournemouth are doing to seduce Vasco, whose financial situation is not great, is you can retain a cut in him. “The idea, obviously, is that he moves to England, he does well, and he’s sold on a profit. And Vasco can keep a stake in him and participate in that profit.“So, we’ll see. I suspect that the money will talk. If Bournemouth really, really want him, I suspect the money will talk. “For me, I’d just be a little bit worried. It might be happening six months or a year too early.”