Over the first 10 days of 2017, we're examining the Top 10 players on the ATP and WTA tours—how will they fare during the new season? All of the previews can be found here.

Late bloomers are the rule rather than the exception these days, but how many of us thought this flaky Frenchman would have his best year at age 30? That’s what happened in 2016. Gael Monfils finished a career-high No. 7; he won his biggest title, in Washington, D.C.; he reached his first U.S. Open semifinal; he qualified for his first season-ending championships; and, most surprising of all, he made himself a consistent quarterfinalist at important events. Under new coach Mikael Tillstrom, Monfils played with a newfound focus and seriousness (with one infamous exception.)

Now what are the chances he can do it again in 2017? So far neither age nor a lifetime of injuries have grounded the high-flying Monfils. He’s still virtually impossible to drop shot, and he can still hit a tweener from five feet off the ground. And the new, rocking-horse service motion that he concocted with Tillstrom has made his delivery even more lethal. What Monfils did better than ever in 2016 was beat the players he’s supposed to beat; theoretically, that shouldn’t be too much to ask of him again in 2017. There’s also plenty of room to improve; his passive, middling return of serve, in particular, would seem to be eminently fixable. The talent and athleticism is there to make that a much more imposing and useful shot.

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Still, no player can change completely after 12 years on tour. After a solid season in 2014, Monfils looked ready for a surge in 2015, but it never materialized. And at the U.S. Open last year, he squandered his moment on the big stage by choosing to play a bizarrely defensive style against Novak Djokovic in the semifinals. Monfils, ever the perverse showman, seemed to enjoy pulling the rug out from under everyone who had praised his new sobriety and earnestness. There’s always a chance he’ll do something similar, and go back to being a showman full-time, in 2017. Whatever his attitude, Monfils has probably peaked in the rankings; it’s hard to imagine him breaking into the Top 5, especially if Roger Federer and Rafael Nadal return to anywhere close to their old form. And if he stops moving up, how long will it be before he gets tired of the effort? But as long as Monfils is on the court and enjoying himself into his 30s, tennis fans should consider themselves lucky to be part of his show.