Daniil Medvedev suffered consecutive opening game losses as he was dumped out of the Cincinnati Open by Jiri Lehecka in straight sets. 

Medvedev, who was beaten by Alejandro Davidovich Fokina in Montreal last week, endured another early exit, losing 7-6 (7-2) 6-4 in just under two hours against the Czech.

“It’s amazing to be back, to be honest. To get a win against such a talented player as Daniil surely is, is just such a bonus for me," Lehecka said on being back in his first tournament in three months after injury.

Lehecka squandered four game points in the opener, with Medvedev also missing an opportunity for an early break, but the Czech was able to hold his opening serve. 

The pair traded blows for the remainder, but the world number five struggled in the tiebreak, losing three games in a row to hand Lehecka the advantage. 

And the decisive moment came in the seventh game of the second, as Lehecka broke Medvedev's serve, edging closer to a memorable triumph. 

The Czech missed four match points in the final two games, but was not to be denied a fifth time, ending the encounter with a fierce serve to set up a meeting with Frances Tiafoe in the next round. 

Data Debrief: Lehecka continues winning return in Cincinnati

Since 1990, Lehecka is now the fourth player ranked outside the ATP's top 30 to claim top five wins at three ATP Masters 1000 events in a season after Gaston Gaudio (2001), Hicham Arazi (2001) and Tommy Paul (2022). 

Excluding the ATP Tour Finals, Medvedev has been defeated in three consecutive ATP matches on hard court for the first time since October in 2017.

Jiri Lehecka progressed to the first ATP Masters 1000 semi-final of his career as Daniil Medvedev retired hurt on Thursday at the Madrid Open.

Lehecka, who beat the great Rafael Nadal in the last 16, had just taken the first set 6-4 when Medvedev threw in the towel.

Medvedev had earlier received treatment from the physio, having seemingly struggled when moving to his right side.

"It's never easy in a match like this," Lehecka said. "If I were to choose the way how to win this match, it wouldn't be like that.

"So of course, it's never easy to see your opponent struggling, but at that moment, you just need to focus on yourself, trying to get the maximum level out of yourself."

Lehecka will face Felix Auger-Aliassime, who progressed thanks to a walkover following Jannik Sinner's withdrawal, for a place in the final.

Data Debrief: Czech mates

Lehecka is the third Czech player to reach the semi-finals in Madrid, following Jiri Vovak and Tomas Berdych.

Should Lehecka reach the final, he will move into the top 20 of the ATP rankings for the first time.

Rafael Nadal paid tribute to supporters after his farewell appearance at the Madrid Open ended following defeat to Jiri Lehecka in the last 16.

The 22-time grand slam champion bowed out after going down in straight sets against his Czech opponent, who prevailed 7-5 6-4 to set up a quarter-final clash with Daniil Medvedev.

Nadal was honoured following the conclusion of the final match at his home ATP Masters event, where he triumphed in 2008, 2010, 2013, 2014 and 2017.

Five banners to represent each of his titles were unfurled, displaying the message 'Gracias Rafa', while he was also presented with a trophy by tournament CEO Gerard Tsobanian and director Feliciano Lopez. 

"It's been a very special week for me, very positive in many ways, both personally and for my tennis," he said during his on-court interview.

"I had the chance to play again on court. A few weeks ago, two days before Barcelona, I didn’t know if I would compete in an official match again, and I've now played two weeks. It's been unforgettable.

"This is one of those days that when it arrives, it's very tough, but life and my body have been sending me signals for a long time.

"The only thing I can say is thank you. It's been an incredible journey that started when I was little. I came to Madrid for the first time in 2003, when the tournament was played indoors.

"The first time I came here feeling competitive was in 2005. It was one of the most exciting wins of my career. Ever since, the support has been unconditional from everyone. I cannot thank you enough.

"Even though it's not over, this is the last time I'll be in Madrid. You have given me a gift for the last 21 years that's more significant than any Grand Slam I have won. The emotions of playing in Madrid, in front of the Spanish fans, is something that will stay with me forever."

Jiri Lehecka claimed a memorable win over one of tennis' greats as he downed Rafael Nadal at the Madrid Open.

Nadal's farewell appearance at the tournament he has won five times came to an end with a 7-5 6-4 defeat on Tuesday.

The 22-time grand slam champion had been hoping to tee up a quarter-final against Daniil Medvedev.

Ultimately, though, world number 31 Lehecka was the man who progressed.

Lehecka ruined the hopes of the Nadal fans packed into the stands in the Spanish capital, and took control when he reeled off 10 straight points to take the opening set.

Nadal won the Madrid Open in 2008, 2010, 2013, 2014 and 2017, and said farewell to the crowd in an on-court interview following his defeat.

Data Debrief: Nadal falls short of milestone

Nadal had been hoping to win his 60th match at the Madrid Open, while he would have reached his 100th ATP Masters 1000 quarter-final had he won. This was his first defeat to a player ranked lower than 20th in the world since he went down to Pablo Cuevas in 2016.

Lehecka, meanwhile, will make his second appearance in the last eight of a Masters 1000 event.