Felix Auger-Aliassime is on an incredible late-season run on the ATP tour. The Canadian advanced into the Swiss Indoors final in Basel on Saturday with an upset victory over World No. 1 Carlos Alcaraz.With a 2-0 head-to-head edge over the Spaniard, Auger-Aliassime dominated their latest contest. He won in straight sets, 6-3, 6-2, in an hour and 22 minutes to keep his perfect record against the 19-year-old. The Canadian has now won his last 12 matches in a row after claiming back-to-back titles in Florence and Antwerp.Tennis TV@TennisTVGOD MODE FELIX The moment @felixtennis defeated world No.1 Alcaraz in Basel - his third win over the Spaniard in as many meetings!#SwissIndoorsBasel44173GOD MODE FELIX 🇨🇦The moment @felixtennis defeated world No.1 Alcaraz in Basel - his third win over the Spaniard in as many meetings!#SwissIndoorsBasel https://t.co/cL0IEPnVEbThe 22-year-old will play the winner of Saturday's second semifinal between Holger Rune, who advanced to the French Open quarterfinals, and Roberto Bautista Agut.In view of the Canadian's win, tennis fans took to Twitter to express their excitement."Carlos Alcaraz might be #1 in the world, but the best player in the world right now is Felix," one user wrote.The horror! The horror! 😱💀🎃👻👽@trevor_writes@TennisCanada @nationalbank Carlos Alcaraz might be #1 in the world, but the best player in the world right now is Felix. #Felix #Tennis #SwissIndoorsBasel14@TennisCanada @nationalbank Carlos Alcaraz might be #1 in the world, but the best player in the world right now is Felix. #Felix #Tennis #SwissIndoorsBasel"FAA is world number one potential and multiple grand slam champion potential. I think he’s beginning to realise that it’s either now or never for him," another user wrote.Chris@christophers98@josemorgado FAA is world number one potential and multiple grand slam champion potential. I think he’s beginning to realise that it’s either now or never for him.2@josemorgado FAA is world number one potential and multiple grand slam champion potential. I think he’s beginning to realise that it’s either now or never for him."As they say, it's easy to get to the top, it's difficult to maintain it. Now that he is no.1, challenge starts from here for alcaraz and so far as no.1 his results have been inconsistent and disappointing comparing to his level all year. Also cheers for FAA. Great showing," another account tweeted.Sayan@Tweets_by_Sayan@josemorgado As they say, it's easy to get to the top, it's difficult to maintain it. Now that he is no.1, challenge starts from here for alcaraz and so far as no.1 his results have been inconsistent and disappointing comparing to his level all year.Also cheers for FAA. Great showing20@josemorgado As they say, it's easy to get to the top, it's difficult to maintain it. Now that he is no.1, challenge starts from here for alcaraz and so far as no.1 his results have been inconsistent and disappointing comparing to his level all year.Also cheers for FAA. Great showingHere are a few more fan reactions:jatterss@jatterss@josemorgado hope he continues to keep up this form, next grand slam winner !3@josemorgado hope he continues to keep up this form, next grand slam winner !Greg@HotBoyNY1@josemorgado Huge congrats to Felix and loving the consistency, but was rooting for Carlos.@josemorgado Huge congrats to Felix and loving the consistency, but was rooting for Carlos.Sgs Vishnu@SgsVishnu@josemorgado It looked like Novak Djokovic was playing Rafa Nadal on Indoor hard..Just better in all departments..1@josemorgado It looked like Novak Djokovic was playing Rafa Nadal on Indoor hard..Just better in all departments..Maria Panova@notsleeeping@josemorgado Felix needs to bring this form to majors next yearAmong Felix, Carlos and Sinner, the young players have arrived!2@josemorgado Felix needs to bring this form to majors next yearAmong Felix, Carlos and Sinner, the young players have arrived!Whit.J@Whitnee_JJ@josemorgado A player born on August 8th beating a Spaniard. Some things never change. 4@josemorgado A player born on August 8th beating a Spaniard. Some things never change. 😉😁Stefan Maurer@smaurer81@josemorgado He‘s coming into his own. This guy is special. He‘ll win a Slam in 23 or 24.@josemorgado He‘s coming into his own. This guy is special. He‘ll win a Slam in 23 or 24.centmile@centmile13Fucking insane twitter.com/josemorgado/st…José Morgado@josemorgadoFelix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.1422124Felix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.Fucking insane twitter.com/josemorgado/st…eve:)@rafas80ftyachthuhhhhh felix slaying????? i’ve been longing for these moments haven’t been watching lately but so proud of him x twitter.com/josemorgado/st…José Morgado@josemorgadoFelix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.1422125Felix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.huhhhhh felix slaying????? i’ve been longing for these moments😭❤️ haven’t been watching lately but so proud of him x twitter.com/josemorgado/st…thal@thalissufferingthat ((post US Open)) kinda hurt me ugh felix you should had performed like this at USO twitter.com/josemorgado/st…José Morgado@josemorgadoFelix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.1125Felix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.that ((post US Open)) kinda hurt me ugh felix you should had performed like this at USO😤 twitter.com/josemorgado/st…Freyville💯@JnrFreyFelix beating the No.1 player is just nuts 🏽🏽🏽🏽 twitter.com/josemorgado/st…José Morgado@josemorgadoFelix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.1425125Felix Auger-Aliassime play great to beat Carlos Alcaraz for the 3rd time in three meetings, 6-3, 6-2, and reach the final in Basel.12th consecutive win, 3rd consecutive final. Best player in the world post US Open.Felix beating the No.1 player is just nuts 🙌🏽🙌🏽🙌🏽🙌🏽 twitter.com/josemorgado/st…"It's good that I grew up in Montreal, spending half the year indoors growing up" - Felix Auger-AliassimeFelix Auger-Aliassime pictured at the Swiss Indoor Basel.In his post-match on-court interview, Felix Auger-Aliassime said that growing up in Montreal and practicing on indoor courts contributed significantly to his success in Basel."I guess it's good that I grew up in Montreal, you know. I mean, you guys know here as well but yeah, spending half the year indoors growing up, I guess it's paying off now," Felix Auger-Aliassime said, adding, "So I'm happy with the way of I've been playing but yeah, I guess so the indoors have been very fortunate to me and I've been playing some great tennis in the last couple of months."When asked about his performance against Carlos Alcaraz, Auger-Aliassime expressed his happiness at having defeated the "best player in the world" in such a convincing manner."Yeah, so far very close to perfect. I've been serving amazingly not getting broken once yet, so there is still one more match to go, but it's been a fantastic week. Played some great tennis. And again today against the best player in the world. It's an amazing win. So, I'm really happy with my level and hopefully, I can go all the way," he said.