Jannik Sinner and new world-class tennis rivalry. GETTY IMAGES

The Italian won the ATP Miami Open Masters 1000 title over the Bulgarian Dimitrov and climbed to the second place in the ATP World Ranking, just behind the great Novak Djokovic. His rivalry with Carlos Alcaraz could be the new chapter in tennis.

Jannik Sinner clinched the ATP Miami Open Masters 1000 championship, securing a commanding 6-3, 6-1 victory over Bulgarian Grigor Dimitrov in the final match at the Hard Rock Stadium, in 72 minutes. The Italian raced into a 3-1 lead in the second set, a moment when he unleashed his powerful serve and broke back solidly to seal victory.

After the Australian Open and the Rotterdam Indoors, this Masters 1000 is his third title of the season and takes him to an impressive career milestone as he climbs to second in the ATP World Ranking, ahead of rising Spanish star Carlos Alcaraz.

"I started the season really, really well. I never thought (I would) start like this. To be number two is an amazing feeling. I never thought I would reach this point," said a delighted Sinner.

The 22-year-old insists he stays focused during matches: "Because of my personality, I always try to stay calm, but you can't just sit back, you have to attack and to be mentally focused on every situation on the court."

An increasingly popular figure on social media, Sinner has won 25 of his last 26 matches. The only player to beat him this season is Carlos Alcaraz in the semi-final at Indian Wells. The Italian has been playing world-class tennis on the hardcourt tournements, a run that has come to an end on the clay en route to Roland Garros. 

Sinner's final opponent in Miami, Grigor Dimitrov, said: "I think Jannik is clearly playing outstanding tennis at the moment. He's the best player in the world right now.

The world number two was more cautious. "I have a great team to push me, and we know what we need to improve on as the clay season approaches. I usually have some difficulties there, so we'll see what I can do this season (...) I feel like I've learned a lot of things since last year," he stressed.

Sinner's coach, Darren Cahill, believes tennis is in good hands after the void could be left behind by Roger Federer's retirement, Rafa Nadal's injuries and the pair's battle with Novak Djokovic. 

"I think tennis is in great hands at the moment with the likes of those two (Sinner and Alcaraz) and many other players coming through who are going to carry the torch through a generation that we've been so fortunate to see over the last 20 years," Cahill said. 

Despite Sinner's high level of play, the former Lleyton Hewitt coach believes there is still plenty of room for improvement. "For where he is at the moment, right now, he's playing a 10. You can't sugar-coat it. He's playing great and his level (in Miami) was fantastic. But he can get better," Cahill concluded.