The 24-year-old then pounced with Lehecka serving at 4-5, reaching match point with a searing backhand pass and wrapping up victory as his opponent netted a backhand.
Russia's fourth seed Daniil Medvedev crushed Stefanos Tsitsipas in straight sets to set up a title clash with Novak Djokovic at the Australian Open in Melbourne on Friday.
Images from the men's singles fourth round matches at the Australian Open, on Sunday.
Newly crowned Australian Open champion NOvak Djokovic was not short of energy as he overpowered Andy Murray to claim his sixth Australian Open title.
Djokovic, seeking a record-extending ninth title in Melbourne, was cruising after winning the opening two sets of his third-round clash but a slip at 1-1 in the third set almost derailed his progress.
Novak Djokovic took a tumble in the first set but returned to his feet quickly to complete a 6-0, 6-4, 6-4 trouncing of Argentine Leonardo Mayer and march into the third round of the Australian Open on Wednesday.
Security officials promptly made a human shield around the players as some others dragged the person
Jannik Sinner has sprinted past opponents at the Australian Open in his quest for a maiden Grand Slam but could end up running a marathon in the final against Daniil Medvedev on Sunday, when Melbourne Park will crown a new king.
Victoria Azarenka refuses to accept that Maria Sharapova's greater experience could be the defining factor when they meet in the Australian Open women's final on Saturday.
Images from Day 5 of the 2024 Australian Open in Melbourne on Thursday.
Djokovic has never failed to win the tournament after making the semi-finals and he will be heavily favoured to claim a record-extending ninth title at his favourite Slam on Sunday.
Images from the quarter-final matches played at the Australian Open at Melbourne Park on Tuesday
Indian tennis ace Sania Mirza and her Romanian partner Horia Tecau's dream run came to an end in the mixed doubles event of the Australian Open on Sunday.
Novak Djokovic showed a few signs of rustiness after the off-season but still comfortably reached the second round of the Australian Open with a 6-3, 7-6 (7-2), 6-1 victory over Lukas Lacko on Monday.
'In some ways it is good, maybe, if that was my last match because I lost my first match in the Davis Cup and I lost my last one. We close the circle'
A resurgent Svetlana Kuznetsova stunned former World No. 1 Caroline Wozniacki in an absorbing encounter on Rod Laver Arena to reach the quarter-finals of the Australian Open with a 6-2, 2-6, 7-5 victory on Monday.
So prior to their Melbourne Park rematch, former champion Sharapova said she was primed and ready for another drawn out dog-fight against the 14th seed.
Li Na wore down Agnieszka Radwanska with a barrage of power-hitting to beat the fourth seed 7-5, 6-3 and advance to her third semi-final at the Australian Open on Tuesday.
After two years in the spotlight as Australian Open champion, Victoria Azarenka was reduced to a spectator against Agnieszka Radwanska as she crashed out of the quarter-finals in a bout of self-flagellation on Wednesday.
Images from Day 9 of the 2022 Australian Open, at Melbourne Park, on Tuesday.
Defending champion Victoria Azarenka suffered a panic attack trying to close out her Australian Open semi-final against American teenager Sloane Stephens on Thursday and needed a long medical timeout before setting up a final against Li Na.
Defending champion Novak Djokovic returns to the Australian Open seeking his third consecutive trophy at Melbourne Park, where memories of last year's gut-wrenching final against Rafa Nadal still linger around Rod Laver Arena's blue centre court.
Sebastian Korda is just the third American to reach the quarter-finals at the Australian Open.
Images from Day 7 of the 2022 Australian Open at Melbourne Park on Sunday.
Leander Paes and Radek Stepanek upset Bob and Mike Bryan 7-6(1), 6-2 to win the Australian Open doubles title on Saturday and foil the American twins' bid for a record 12th Grand Slam crown.
Roger Federer, Rafa Nadal and other top tennis players hammed it up in exhibition matches on the eve of the Australian Open to raise money for victims of the country's devastating floods on Sunday.
The tennis greats announced on Wednesday that they had committed to lead the teams for the first three years of the new competition, patterned after golf's Ryder Cup
Silent assassin Agnieszka Radwanska ended Victoria Azarenka's bid for a hat-trick of titles at Melbourne Park on Wednesday and reached her maiden Australian Open semi-final with a 6-1, 5-7, 6-0 win.
Heartbroken by Djokovic in two five-set epics in Melbourne and the US Open last year, the eighth-seeded Swiss played out of his skin to upset his Grand Slam nemesis 2-6, 6-4, 6-2, 3-6, 9-7 in an exhilarating four hours.
Third seed Maria Sharapova was dumped out of the Australian Open on Monday with a 3-6, 6-4, 6-1 fourth round loss to Slovakia's Dominika Cibulkova on Rod Laver Arena.
Picking up her racquet bag and marching straight out of Rod Laver Arena without a nod or a wave, Maria Sharapova's abrupt exit after her fourth-round loss to Dominika Cibulkova on Monday spoke volumes of her disdain for a forgettable Australian Open.
Serena Williams admitted that a bad back sustained during practice hampered her movement during her shock fourth round loss to Ana Ivanovic on Sunday, but refused to blame the injury for her stunning exit that blew the Australian Open wide open.
Images from the Australian Open matches played on Sunday.
Serbia's Ana Ivanovic stunned World No 1 Serena Williams at the Australian Open on Sunday with a 4-6, 6-3, 6-3 fourth-round upset at Rod Laver Arena.
Images from the Friday's play at the Australian Open.
Victoria Azarenka said the prospect of winning a third straight Australian Open title is an inspiration, not a pressure, after booking her place in the third round.
The thought of playing a long match in the extreme Melbourne heat resulted in a sleepless night for Serena Williams, but the World No 1 need not have worried as she strode swiftly into the Australian Open third round on Wednesday.
Images from the Australian Open matches played in Melbourne on Tuesday.
Images of the Day 11 of the Australian Open.
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