MIAMI GARDENS, Fla. — Novak Djokovic moved within two sets of another milestone Friday, beating Grigor Dimitrov in straight sets to make the finals of the Miami Open.

With Lionel Messi watching from a private suite above the court at Hard Rock Stadium, Djokovic did what he has been doing to Dimitrov for most of the last 15 years — using his relentless efficiency, tactical know-how and a serve that is working as well as it has in months, to overwhelm the stylish Bulgarian and one of his close friends, 6-2, 6-3 in 70 minutes.

Djokovic will face either Taylor Fritz or Jakub Mensik in the final on Sunday. A win would give Djokovic his 100th tour-level title in singles, putting him in an elite group of just three players who have accomplished that feat during their careers.

Jimmy Connors, with 109 titles, is the leader. Roger Federer has 103 career tournament victories.

Djokovic has largely surpassed Federer in the greatest-of-all-time debate since he will finish his career with 24 Grand Slam titles to 20 for Federer. Djokovic also has 40 Masters 1,000 titles, compared with “just” 28 for Federer.

And now, he is steaming toward another tournament title that will launch him into triple-digit territory. Almost lost in all this was that Djokovic had already reached another milestone before he hit the first ball on Friday. With his win Wednesday in the quarterfinals over Sebastian Korda, Djokovic became, at 37, the oldest man to reach a Masters 1,000 semifinal.

Now he’s the oldest to reach a final.

Djokovic now has a 13-1 record against Dimitrov. There is only one thing Dimitrov does better on a tennis court than Djokovic, which is hit a one-handed backhand, but maybe only because Djokovic doesn’t hit one, except when he is hitting a backhand slice that is one of the great shots in the game.

Dimitrov’s is darn good, too, especially on the fast hard court in Miami where the ball can slide across the court as much as it bounces. But Djokovic matched him slice for slice, and then some.

Djokovic’s biggest challenge Friday might have been playing in front of one of his idols in Messi for the first time.

“I was a bit nervous,” he said on the court after.

Perhaps, but he certainly didn’t look or play like it.