TOP 5 BIGGEST QUESTIONS OF 2024 (MEN'S TENNIS)
In no particular order...
How will Rafa return? This is especially important for clay season, as I don't expect him to do much early on...just getting back into the pace of things. We haven't really seen a great player miss a full year in, well, I don't know how long. The best player in recent decades who missed that much time at once is probably Del Potro; literally no all-time great missed a full year at once in the Open Era - not even Agassi in '97 or McEnroe in '86. So for Rafa, at 37 years old, it is a bit like jumping on a moving train. If anyone can do it, he can, but it is a tall order.
Will Holger Rune (ever) put it all together? I've gone on record as saying I like Holger's upside as much or even more than Alcaraz's. It is not that I think he has a legit chance of a better career, but that I see a peak level that is reminiscent of Stanimal - just ferocious. Funny how he had those dust-ups with Stan. Anyhow, if he ever figures out how to harness his power, he's going to be the most feared player on tour. If not, well, he might be relegated to erratic spoiler.
Does Carlos Alcaraz have another gear (and if so, will he unlock it in 2024)? I think he does, but in conversations about his blossoming greatness, the specter of Lleyton Hewitt has been mentioned. The pesky Aussie wasn't a fluke - he was a legit elite player for half a decade or so whose peak just happened to fall on a weak part of tennis history, between the reigns of Sampras and Federer. But despite winning his only two Slams and Tour Finals in 2001-02, and adding a Masters in 2003, he didn't really start declining until 2006, it is just that the game passed him by: Roger and then Rafa were just so much better. I don't think Carlos will be another Hewitt - he's already better than Lleyton ever was - but until we see that stratospheric level, he might end up more in the Edberg/Becker class than the Lendl/Sampras class (not to mention Big Three class). But time will tell and we'll know more a year from now.
How much better will Jannik Sinner get? If the Next Gen Big Three was Medvedev-Zverev-Tsitsipas (or Thiem), then the Millenial Big Three is looking like Alcaraz-Rune-Sinner. I have pointed out how Jannik's rise in Elo is almost exactly the same as Roger Federer's at the same age, who was a late bloomer relative to Nadal and Djokovic. But unlike those two, for Roger it came together all at once. Roger's rise in 2001-03 was relatively slow and his results inconsistent; but then he supernova-ed in 2004. Jannik will be the same age in 2024 as Roger was in 2004. Now I'm not saying that Jannik is going to be anywhere as good as Roger, just that he's a similar sort of player in terms of developmental arc, and over the last half year, things really seemed to come together for him. Consider that since from Wimbledon on, he was 29-5 (ignoring walkovers), an 85.3%...which is a prime year from the Big Three. If he maintains that level for all of 2024, he's a #1 candidate.
Will Novak start slipping? He's shown literally no signs of that...or rather, only moments where the best of the young group (Alcaraz, Rune/Sinner/Medvedev in a good moment) hold muster. But Father Time and all. Novak will turn 37 next year, which is what Roger turned in 2018, the last year he won a Slam. Unlike Roger, Novak doesn't have equals 5-6 years his junior to contend with - just a wild and woolly pack of lesser Next Genners and rising Millennials. But with his 2023 season--which I rank as the third best of his career after only 2011 and 2015 (though much closer to his other peak years of 2012-14, 2016, and 2021 than those two historic seasons)--he enters 2024 as, still, the player to beat, a half step ahead of that Alcaraz kid. So while I don't foresee a sharp decline in 2024, it could be the year that he's finally dethroned. Meaning, a year from now will we finally be able to say for the first time since 2003, that one of the Big Three is not the best player in the world?
There are other questions and players to consider -- how good is this Ben Shelton kid? With his Basel title, did FAA right the ship? What is the upside of Arthur Fils? Etc. But the above five are the biggest in terms of potential impact, depending upon how they're answered.