Tsitsipas is the highest remaining seeded male player in the tournament.
“I’m feeling great with my tennis. I don’t think I felt so good in a long time,” said Tsitsipas.
“I’m a different player, playing different. My mentality is different.”
This is the fourth time he’s made it to the semifinals of the Australian Open. Should he win the title, he will rise to Number 1 in the world rankings.
He was very much in control during his match with Lehecka. But he did show some of his trademark temper in the third set when he smacked the ball into a wall after he lost a point.
“What I did, definitely I’m not happy about that. I shouldn’t have done it,” Tsitsipas said about the incident.
He will next go up against Khachanov who will be in his second consecutive Grand Slam semifinals. He also reached the last four of the 2022 US Open.
He defeated American player Sebastian Korda in the quarterfinals 7-6, 6-3, 3-0.
He won his match after Korda was forced to retire in the third set with a right wrist injury.
“For sure, back-to-back semi-finals in a Grand Slam feels great,” Khachanov said on-court.
“Obviously not the way you want to finish the match. I think until a certain point it was very competitive, a very good battle. Sebastian beat one of my friends, Daniil [Medvedev], in three sets and won in five sets against Hurkacz. He is playing great tennis.”
“I’m feeling good, to be honest. I’m really happy about my level, about the way I compete, and looking forward to the semi-finals here in Australia for the first time.”