After impressing during the second half of the 2023/24 campaign, the loan deal was extended to cover the entire 2024/25 season and excelled in helping Strasbourg finish seventh in Ligue 1, thus qualifying for the Conference League play-off round.
Netting 10 league goals has seen the 21-year-old attract interest from several clubs across Europe.
In an interview with the Daily Mail, Santos said: “The only conversation I had was that I’d play in the Club World Cup for Chelsea, and after that, we’ll see what happens.
“Everyone knows how much I love the club and my desire to play here.
“Enzo Maresca was very sincere with me. I went to Strasbourg to get minutes. Now we’ll see how it goes at the Club World Cup.
“The affection from Chelsea fans is something very special as well. Ever since the news broke that I was going to Chelsea, they started sending me a lot of messages. Back when I was at Vasco, too.
“And I had the spell at Nottingham, where I didn’t play, but they sent me messages there too, I’d see some posts, they’d tag me on Instagram and Twitter.”