You're not concerned about his history of choking big matches? He had Djokovic on the ropes at the AO this year and choked another match he should have won in four sets. He may have the game to win the USO (if it's played), but not the mentality. Until he wins a major, I pin no hopes on him.
Explain to me why Thiem should've won in 4 sets! He never broke serve in the last 2 sets, and was broken twice. And unlike Nadal, who lost 3 tiebreaks to Thiem at the same tournament, Djokovic actually knows how to play tiebreaks! Just ask Federer, and Nadal!
BTW, I heard this from Fedfans and Rafans before, and it mystified me. Thiem never came anywhere close to victory! He came within a set, but not any closer than that!
BTW, Medvedev in '19 USO and Thiem in '20 AO lost by the same score in the final set, 6-4. But Medvedev distinguished himself more by taking the next 2 sets after losing the first two. And no Djokfan has ever stated that Medvedev should've taken that match, much less repeatedly.
It's weird how Rafans blame Thiem for losing to Djokovic at AO the only time they met. Yet Nadal has never managed to beat Djokovic at 'AO. In '12, Nadal even held one break lead in the fifth. (Rafans, that's coming close to victory, and then choking it all away!) And just a year earlier than the 5-set Djokovic-Thiem battle, Djokovic blasted Nadal in 3 sets. So why was Thiem a lame loser, when he did much better than your hero at the same stage a year apart?
For a guy who came back from 2 match points down to Federer, 3 times, coming back from 2 sets down to Thiem once, is no big deal, don't you think? And yet Rafans and Fedfans keep piling on!