Carlos Alcaraz has admitted that he can’t help but think about having the chance to reclaim the World No.1 spot at the US Open.The Spanish sensation has reached the semi-finals in New York by comfortably beating Jiri Lehecka 6-4, 6-2, 6-4. Alcaraz has cruised through the US Open semi-finals by beating LeheckaAFPHe is yet to drop a single set at the Grand Slam and he’s now booked himself a spot in his ninth career major semi.By doing so, Alcaraz still has a chance to reclaim the No.1 world ranking, which currently belongs to Jannik Sinner. Sinner has held the title since June 2024, but he’s got his rival and World No.2 breathing down his neck at the US Open. The Italian must now reach the final at Flushing Meadows to keep his spot after Alcaraz reached the semis.Should Sinner and Alcaraz go on to meet in the showpiece, then the winner would leave first in the ATP rankings.Novak Djokovic or Taylor Fritz await the Spaniard in his semi-final, with the current No.1 still to take on Lorenzo Musetti for a chance to face Felix Auger-Aliassime or Alex de Minaur in his semi.Speaking about the chance to get back to top spot in the world, Alcaraz said on Tuesday: “It’s really difficult not to think about it. “Every time I step on court, I try not to think about it. If I think about the number one spot too much, I’m gonna put pressure on myself.“I just want to step on the court and try to do my thing. Follow my goals on the match. Try to enjoy as much as I can. “The number one is there, but I’m trying not to think much about it.”Alcaraz is hoping to reclaim his No.1 spot from Sinner in New YorkGettyAlcaraz sets 47-year recordBy beating Lehecka in the quarter-finals at the US Open, Alcaraz has achieved some impressive feats.At 22 years and 111 days old, he’s set a 47-year tennis record. He is the youngest player to reach the Men’s Singles semi-finals on all three surfaces in multiple seasons at Grand Slams since 1978.On top of that, Alcaraz is also now the youngest man to reach a Grand Slam semi without dropping a set since Rafael Nadal in 2008.And only Nadal, Bjorn Borg and Boris Becker (ten) have reached more men’s semi-finals at Grand Slams before turning 23 than Alcaraz (9).If he goes on to win the US Open without dropping a set too, he’ll make history as the first man ever to do so. Alcaraz is on the brink of history at the US OpenGettyWhat else did Alcaraz say? As well as Alcaraz’s admission that he keeps thinking about becoming World No.1 again, he also revealed more.The 22-year-old was asked following his win over Lehecka whether he watched his own highlights back after a match. He replied: “Sometimes when I go to the living room, my little brothers are watching. “I sit down and watch my highlights and enjoy again. Every time I watch the match and remind myself of those shots, I enjoy it.”Alcaraz will face either Fritz or Djokovic at the Arthur Ashe Stadium on Friday.