The win handed Thiem his biggest win of the Slam, in what is his seventh appearance at the Slam. He has a win percentage of more than 60, to date.
While he has reached his maiden AO semis, it would also be his third semis appearance across all the Slams.
This was also his 59th win at Slams, with a win percentage of 70-plus.
Nadal suffers 14th AO loss
Thiem's gain came at Nadal's expense as the latter suffered his 14th loss at the AO, where he has a win percentage of more than 82. Overall, it was his 39th loss at the Slams, while he has an aggregate Slam win percentage of 88.
Thiem admits it was a tough situation
Following the win, Thiem said that he was looking to stay in the match throughout.
Also, serving for the match was special for him, despite finding it difficult to handle the tough situations.
"It's a little bit 'demons in the head'. I was just rushing too much...changing my tactics. You have to deal with these situations almost every single game," he said.
Thiem to face Alexander Zverev in semis
Thiem would be up for a tough clash against Germany's Alexander Zverev, who is ranked seventh in the world.
While Zverev would be playing his maiden Slam semis, he would be under pressure.
As a result, Thiem, ranked fifth, would have a slight psychological advantage over the German.