KEY BISCAYNE, Fla.—Can a match in which two players combine to double fault 13 times and make 36 more errors than winners still be considered must-see tennis? In the case of Novak Djokovic’s gritty, grouchy, anything-but-straightforward 6-3, 6-4 win here over Dominic Thiem, the answer was an emphatic yes. It began with a ripple of anticipation as the upstart mounted a challenge to the champion, and ended with the champion staving off the upstart by holding serve in an impossibly tense 14-minute final game.
You could argue that these two men have been the most consequential players of the ATP's 2016 season so far. Djokovic has won the Australian Open and Indian Wells, and sits at No. 1 in the year-long race to London; in that, he represents the continued authority of the Big Four. At the same time, Thiem has won two tournaments and risen to No. 4 in the race; more than anyone else, he represents a new generation that may finally give tennis fans an idea of what the sport’s future will look like.
On Tuesday they met for the first time since 2014. Over the course of nearly two hours of heavy hitting and heavier grunting in the stifling Florida humidity, we saw again what makes even a less-than-flawless Djokovic so tough to beat, and what makes Thiem, in many ways—but not yet in all ways—the heir apparent to his No. 1 throne. Much like Rafael Nadal’s win over Alexander Zverev two weeks ago in Indian Wells, this was a match in which a new generation pushed, only to see an older generation push back harder.
“It was a straight-set win,” a ragged but relieved Djokovic said afterward, “but it was far from easy.”