At twenty-five years-old, Dominic Thiem can easily be defined as the man closest to the Big Three. Much more than Alexander Zverev and Stefanos Tsitsipas. Considering the new generations, the other players have not been able to get what the Austrian is getting, thanks to a destiny that will lead him to win at least the French Open within a few seasons.
It's true, Zverev won more ATP Masters 1000 and triumphed at the ATP Finals, but in general, the German won less than his rival-friend, and in the Slams he did not go beyond the quarter-finals at Roland Garros (in 2018 and 2019).
Thiem has instead already played two finals, right in Paris, losing to the Master of the Roland Garros, Rafael Nadal. But behind the Spaniard, Roger Federer and Novak Djokovic there is Thiem. The improvements of the Austrian are evident, starting from 2016 until this season, his best year, where he won his first ATP Masters 1000 title and played his second final at the French Open, winning, so far, a total of three titles, and expressing on clay-courts, a tennis second only to that of Nadal.
By winning Indian Wells against Federer, Thiem was able to perform well even on fast surfaces. The crucial point in order to become a top player will, in fact, be to become competitive with the Big Three on all playing surfaces.
He is already doing it, and between the second half of 2019 and 2020, everyone expects his definitive qualitative leap. Of course, the defeat at the first round of the US Open against Thomas Fabbiano was unexpected. This does not affect the good things he did during the rest of the season.
But it's clear how Thiem will have to calibrate better his schedule in order to not arrive at the end of August without psycho-physical energies. This is a problem that is being presented too often in the last few seasons.
At his excellent defensive phase, Thiem also adds an excellent offensive phase, with tennis that in this way is perfect for clay-courts, but no less effective on hard-surfaces. On grass-courts, he will have to make the most important improvements to become a complete player. But meanwhile, if the Big Three were to fail any event, Thiem is ready to be their first successor.