Alexander Zverev will claim world year-end No. 1 honours for the first time on the back of  two Grand Slam titles and a final this season.,

The ATP confirmed the changing of the guard as current No. 1 Jannik Sinner ended his season early last week due to a knee injury which has kept him off court since winning Wimbledon three months ago.

Zverev won Roland Garros and US Open trophies and lost to Sinner in the All England Club final.

His reign at the top will begin after the ATP Final in Turin with the ranking period starting on November 23.

Zverev will be 29 years, 217 days old on the date, three days older than Andre Agassi in 1999 (29 years, 214 days).

Main photo:- Alexander Zverev by ISF Ltd

Jannik Sinner set a personal record with 19 aces as he won an all-Italian struggle with Luciano Darderi 6-1, 6-3, 7-6 (2) on Monday to power into the quarter-finals of the Australian Open.

The two-time defending champion had it all his own way in the first two sets, wrapping them up in barely an hour, But Darderi made the world No. 2 work at the end for his fourth-round victory, saving two match points in the 10th game.

Sinner sprinted ahead in the tiebreaker to advance  after two hours, nine minutes.

“It was very difficult, we are good friends off the court,” Sinner said. “I had difficulties with some opportunities I had which I could not use. So I was glad to close it out in three. 

“I started the match well, finding some pressure points.”

Sinner, coached by Aussie legend Darren Cahill, said that off-season work on his serve is showing results.

“We put in a lot of work on it, changed the motion a bit. But there is still room to improve. I’m feeling more confident with it now and happy how I’ve come into the new season.”

Sinner has never lost to a fellow Italian at the Tour level., winning all 18 matches he has played against compatriots including six at the four majors.

Fellow Italian Lorenzo Musetti booked a spot in the Melbourne last eight for the first time in his career after achieving that level already in Roland Garros and Wimbledon.

The fifth-seeded father of two took revenge over Taylor Fritz, producing a 6-2, 7-5, 6-4 result while competing without his coach and physio, who were forced to return to Europe for personal reasons mid-tournament.

“Real life knocks the door sometimes. It’s something surprising. It makes you understand life better. I feel more mature and I’m playing better for them!,” Musetti said

Fritz defeated the Italian two months ago at the ATP Finals in Turin.

2019 Australian junior champion Musetti earned a date with 10-time champion Novak Djokovic, who advanced in a walkover when intended opponent Jakob Mesnik withdrew with abdominal muscle problems.

Musetti fired 13 aces in victory, breaking Fritz four times, earning his first career win over a top 10 opponent on hardcourt without losing a set. He has now completed a matched set of Grand Slam quarter-finals.

.”I feel very proud, I know Taylor well, we’ve had many battles.” this month’s Hong Kong finalist said.

“I came to this match with a different mentality, my serve worked very well. This was one of the best serving performances of my career.

“My goal was to start the season well and I’ve done that. I’ve never survived the first week here. I’ve worked hard on trying to be more aggressive with the forehand.

“I took the lead in the rallies today,” he said after striking 33 winners in victory.

Carlo Alcaraz has ditched his chrome-look hair, with the world No. 1 back to his natural dark shade.

The platinum blond iteration lasted for only a few autumn months after Alcaraz won the US Open in September, he sported his radical new look during the autumn, including hits straight-set thrashing he took in the ATP Finals in Turin against Jannik Sinner.

The Alcaraz reincarnation was spotted in Miami as the Spaniard attended an NBA game prior to a pair of well-paid American exhibitions with Frances Tiafoe and Joao Fonseca.

Alcaraz, one of the main complainers about the “too long” ATP season, has never been shy about cramming his calendar with exhibition paydays and defended his upcoming US matches.

“First of all, it’s normal that people think that way and they don’t understand why we’re complaining about the calendar and then we set up the exhibition matches,” Alcaraz told the AP.

“But for me, the main difference is that, at a tournament, you’ve got to keep your focus and it’s really physically and mentally demanding for one week and a half. And an exhibition is just one day. 

“You just stay focused, just warm up, just practice not that much – for one match.”

Main photo:- Carlos Alcaraz appears at Miami Heat game minus his platinum blond look