Five-time Grand Slam champion Alcaraz powered past world number 65 Bellucci 6-1, 6-0, 6-3 to set up a meeting with another Italian, 32nd seed Luciano Darderi.

Alcaraz, the 2022 US Open winner, suffered a shock second-round loss at last year's tournament and revealed that was on his mind as he walked out for the night session on Arthur Ashe.

"If I'm honest, I thought about last year when I stepped on the court," said Alcaraz.

"Some bad thoughts. I was nervous about it, like thinking, okay, I don't want to do the same thing as I did last year, losing in the second round.

"I just thought about it a little bit, but, you know, I'm just really happy that I got through and have another chance in the third round."

Any prospect of a repeat letdown was quickly dismissed by the Spanish second seed who won the first five games against Bellucci.

The overmatched left-hander offered little resistance in the opening two sets against a player who now leads the ATP with 56 wins and six titles this season.

Alcaraz wrapped up his latest victory in an hour and 36 minutes to stay on a collision course with reigning champion and world number one Jannik Sinner.

"I played great to be honest from the beginning until the last ball," said Alcaraz.

"I know his (Bellucci's) level. Today wasn't his day and I tried to make the most of his mistakes."

"In general I'm just really happy with the performance," he added. "The less time I spend on court the better for me."

Alcaraz and Sinner have combined to sweep the last seven majors and met in both the French Open and Wimbledon finals this year.

The Spaniard has reached the final at his last seven tour events and cites his painful 2024 defeat to Botic van de Zandschulp in New York as a watershed moment in his career.

"I think it was really helpful for me. Back at that time it was the worst thing I have ever done," said Alcaraz.

"But yeah, looking back, I wanted just to improve from the experience.

"I think when I lost in the second round last year, (it) was one of those moments when I learned a lot how to deal with some situations, how should I have done things much better.

"I think I've just done it this year much, much better.

"So it was a great experience that I learned a lot from."

Djokovic still hunting history

Elsewhere Wednesday, Serbian legend Djokovic kept his dream of a record 25th Grand Slam singles title alive after a four-set defeat of American qualifier Zachary Svajda.

Djokovic though was forced to dig deep after losing the first set before claiming a 6-7 (5/7), 6-3, 6-3, 6-1 win.

Djokovic, 38, said that while not at his best, he is hoping to play himself into form as the tournament progresses.

"That's what I'm hoping, the deeper I go into the tournament the better I feel about my game," he said.

Djokovic's victory sees him into the third round at the US Open for a record-equalling 19th time, where he will face Britain's Cameron Norrie, who defeated Argentina's Francisco Comesana 7-6 (7/5), 6-3, 6-7 (0/7), 7-6 (7/4).

In other men's action on Wednesday, Norwegian 12th seed Casper Ruud, the 2022 US Open finalist, exited to Belgium's Raphael Collignon, losing 6-4, 3-6, 3-6, 6-4, 7-5.

Fourth seed Taylor Fritz advanced safely, beating South Africa's Lloyd Harris 4-6, 7-6 (7/3), 6-2, 6-4, while American compatriot Frances Tiafoe, seeded 17, also progressed with a four-set defeat of qualifier Martin Damm. Tiafoe won 6-4, 7-5, 6-7 (8/10), 7-5.

- 'No class' rant -

In the women's draw, meanwhile, defending champion and world number one Aryna Sabalenka moved into the next round with a workmanlike display to dispatch unseeded Russian Polina Kudermetova 7-6 (7/4), 6-2.

Sabalenka started slowly but after taking the first set on a tie-break, asserted her control to pull away in the second. The Belarusian will play Canada's Leylah Fernandez in the third round.

"The first set was super-tight, super-aggressive. I was glad I was able to handle that pressure and put it back to her. In the second set I felt much better in the return game."

Elsewhere Wednesday's Latvia's 25th seed Jelena Ostapenko was upset 7-5, 6-1 by Taylor Townsend before unleashing a furious on-court tirade at the American.

Townsend said Ostapenko accused her of lacking "class" during her rant.

"She told me I have no education, no class, and to see what happens if we play each other outside of the US," Townsend said. "It was unfortunate, but, you know, it's something I can put on my Tiktok."

Ostapenko said on Instagram she had been angered by Townsend's failure to acknowledge a net cord in her favour during the match.

In other matches, Britain's Emma Raducanu continued her solid start to the tournament after dispatching Indonesian qualifier Janice Tjen in straight sets, winning 6-2, 6-1.

Tjen had become the first Indonesian player to reach the main draw of a Grand Slam in 21 years and followed that up with a first round upset of 24th seed Veronika Kudermetova.

But she was beaten comfortably by Raducanu, who is aiming to recapture the US Open title she won as an 18-year-old qualifier in 2021. Raducanu will face ninth seed Elena Rybakina in the next round.

While Tjen headed for the exit, another player from Southeast Asia, the Philippines' Alexandra Eala, also saw her tournament come to an end.

Eala, the first player from the Philippines to win a Grand Slam singles match with her defeat of 14th seed Clara Tauson on Sunday, was beaten 6-4, 6-3 by Spain's Cristina Bucsa.

Fourth seed Jessica Pegula is also into the third round after beating Russian Anna Blinkova 6-1, 6-3. There was a win too for veteran Victoria Azarenka, the 36-year-old two-time Australian Open champion from Belarus, who defeated Russia's Anastasia Pavlyuchenkova 6-3, 6-3.