Rising tennis star Carlos Alcaraz has no plans of slowing down after his victory at Barcelona at the weekend and making the top 10 for the first time on Monday but said he was surprised by his quick rise through the rankings.

The 18-year-old captured the fourth title of his young career by beating eighth seed Pablo Carreno Busta 6-3, 6-2 in the Barcelona Open final on Sunday, hours after winning a grueling semifinal that was postponed due to rain.

"I did not think I would reach this stage at 18 years old," he told a news conference at a junior event. "It is for the first time for me in the top 10. It means a lot.