MELBOURNE: Rafael Nadal is taking nothing for granted in his Australian Open semi-final against Dominic Thiem despite owning a 100 per cent record at Grand Slams against the slick Austrian.
At stake for both men is a last-four clash against either resurgent veteran Swiss Stan Wawrinka or German young gun Alexander Zverev.
Nadal was stretched to four sets for the first time in the tournament against explosive Australian Nick Kyrgios in the fourth round.
But the Spaniard warned he was getting better by the day as he looks to add to his 2009 Melbourne Park title and draw level with Roger Federer on 20 Grand Slam crowns.
"I think I am moving in the right direction. Every day I'm playing a little bit better," said Nadal, who is aiming for a seventh Australian Open semi, while Thiem is gunning for his first.
The two have met 13 times before and Nadal holds a 9-4 edge but 5-0 in Grand Slams, where he has claimed three of his last four victories over the Austrian.
Thiem was the man he beat in the last two French Open finals and the top seed has a lot of time for how the 26-year-old goes about his business.
"Very tough match. He's playing well. I saw him play (fourth round) against Gael (Monfils). He was playing a very high level of tennis," said Nadal.
"We know each other well. He's a player that I like a lot, the way that he works, the way that he plays, and the way that he tries his best always.
"It is a match that's going to be a tough one, but will be interesting. I know I have to be at my best to have chances."
Thiem took Nadal to four sets in last year's French Open final and pressed him to five in the 2018 US Open quarters, stunning the Spaniard by winning the opening set 6-0.
"I couldn't be happier to be in the quarter-finals," he said, as he continues his search for a maiden Grand Slam title. "I'm also very excited (to play Nadal)."