Alex de Minaur must be sick of the sight of Stefanos Tsitsipas after the Australian No.1 was toppled for the ninth time in a row by the Greek ace.

Tsitsipas improved to 8-0 in main-tour meetings against de Minaur with a relatively routine 6-4 6-3 win in the third round of the Miami Open.

The third-seeded Tsitsipas broke de Minaur in the 10th game of the match to take the first set before he fought off three break points early in the second as his tenacious opponent threatened to hit back.

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Unfortunately for de Minaur it was he who was broken in the fourth game of the second stanza with Tsitsipas dominant from that point on serve.

“I was able to execute very well today,” Tsitsipas told the ATP website after his 90-minute victory.

“There were a few moments where I had to fight a little bit and show my inner strength.

“He fought, as always, and I was very patient. I was trying to focus game after game on how I can open the court and come in.”

Tsitsipas advanced to a round of 16 showdown with his US Open conqueror of last year Carlos Alcaraz, who accounted for the experienced Marin Cilic 6-4 6-4.

Teenager Alcaraz has rocketed to a career-high ranking of 16th with Tsitsipas well aware of the threat posed by the 18-year-old Spaniard.

“I’m going to try and fight. He’s a great player,” world No.5 Tsitsipas said of Alcaraz.

“For me, it is going to be a big challenge … I’m going to put my soul out there and give it my all.”

Meanwhile, top seed Daniil Medvedev is just two wins away from regaining the No.1 ranking from Novak Djokovic as he progressed to the last 16.

Medvedev dispatched unseeded Spaniard Pedro Martinez 6-3 6-4 in 84 minutes.

“I just felt like I had to be more consistent, and the more consistent one today would win,” Medvedev said.

“I managed to just make a few less errors at important moments, serve even better, and it was a small margin but I managed to win and I’m really happy.”

Up next for the Russian is American young gun Jenson Brooksby, who rallied from 0-4 down in the third set to upset 15th-seeded Roberto Bautista Agut 6-3 5-7 6-4.

Indian Wells champion Taylor Fritz defeat fellow American Tommy Paul 7-6 (7-2) 6-4 and will next meet Serbian Miomir Kecmanovic, a 7-6 (7-4) 6-3 winner over Sebastian Korda.

Defending champion Hubert Hurkacz has quietly gone about his business with the Polish eighth seed overcoming Aslan Karatsev 7-5 4-6 6-3 to set up a meeting with South African Lloyd Harris, who got by qualifier Yoshihito Nishioka in three tough sets.