Novak Djokovic had some special company for another Miami Open victory.

With Lionel Messi watching, Djokovic cruised into the Miami Open final by routing 14th-seeded Grigor Dimitrov 6-2 6-3 on Friday at Hard Rock Stadium.

The fourth-seeded Djokovic is trying for his seventh Miami Open title in his first appearance in the event since 2019.

The 37-year-old Djokovic, who won six times at the tournament's previous venue at Key Biscayne, also is going for his 100th professional title.

He has been out of form this year, starting with an injury retirement at the Australian Open in January. Earlier this month, he lost his first match at Indian Wells to Botic van de Zandschulp.

Djokovic next plays the winner of Friday night's Taylor Fritz-Jakub Mensik semi-final.

In his on-court interview, Djokovic acknowledged the presence of Messi, who plays for Major League Soccer's Inter Miami, calling him "King Leo."

Djokovic said Messi had visited the locker room with his wife and children and they "exchanged gifts." Djokovic has seen Messi play live before but this was the first time the soccer great watched him.

"Obviously, it's a thrill to have his whole family,'' Djokovic said. "It's a huge honour. He's such a great athlete, not just a football player. His impact on the world of sports in the last 20 years has been immense.

"To have him watch me live brings me great joy and excitement and also a little pressure. It's definitely different when he brings his family. I was touched by that."

The match was disrupted during the third game when a fan was removed by security. The chair umpire came down to the court and called for security as he walked toward the stands.

Dimitrov had jawed with the fan and came over to the sideline to point out the heckler to the umpire.

"It's just heckling, it's fine,'' Dimitrov said. "I'm a very calm guy overall. I don't pick any fights but don't trigger me.''

Dimitrov eliminated Francisco Cerendulo in the quarters. He stayed on the court for 25 minutes after the victory, sitting in a wheelchair because of dizziness. He was helped off by tournament medical personnel and cancelled his post-match news conference.

Dimitrov said he was given lots of water and ice but added "I don't have a recollection of exactly what happened. We're putting our bodies through so much. It's one of those matches where you have to carry me out of the court somehow.''

Djokovic was broken by Dimitrov in the first game, but he quickly settled down and closed out the first set in 32 minutes.

The men's leader with 24 grand slam titles made 87 per cent of his first serves, missing just six all match on a breezy day. He also committed only five unforced errors in the 70-minute match.

Djokovic will play for a century of titles against unseeded Czech teenager Jakub Mensik.

The 19-year-old Mensik hit 25 aces as he outlasted third seeded Taylor Fritz to win a tight tussle 7-6 4-6 7-6 in almost two and a half hours.

Mensik booked his first ATP Masters 1000 final against his childhood hero.

"It feels incredible," he said about facing Djokovic "It was a dream to play against him in Shanghai. For now it's a bit different.

"I am a better player now and I'm going to enjoy and it's going to be really exciting. Let's see what's going to happen Sunday."