Dominic Thiem conceded his game was "just not there" after he let a two-set lead slip in a shock first-round loss to Pablo Andujar at the French Open.

Thiem had looked in command against a player with no previous top-five wins to his name. However, he crumbled thereafter, further opening a bottom half of the draw that is there for the taking with Novak Djokovic, Rafael Nadal and Federer all in the top half.

It left the two-time finalist at a loss to describe a massive upset that was the defining story of a day that saw Alexander Zverev, the man Thiem beat in last year's US Open final, battle to a five-set win.

There were no such exertions for Stefanos Tsitsipas, who cruised to a straight-sets win over Jeremy Chardy after the 9pm (local time) curfew in Paris robbed his opponent of the backing of the home crowd at Roland Garros.


"JUST NOT GOOD ENOUGH"

Thiem denied any talk of him lacking motivation against Andujar, the Austrian instead pointing to a complete loss of form as the reason for his collapse.

Speaking in the media conference after his 4-6 5-7 6-3 6-4 6-4 loss in nearly four and a half hours, Thiem said: "The game was just not there today.

"All the shots are missing power, they're not accurate enough. [I am] moving not well enough. Everything in my game, there are some percents missing, I actually don't really know why because since I stepped back on court it's already two months and I was really practising well."

Andujar might not have a top-five win, but he beat Federer – currently at number eight in the rankings after an injury absence – recently in Geneva.

Still, Thiem felt it was his own failings that were pivotal.

"Shots were there in practice and it got better in Madrid and Rome, but Lyon and here, the shots and how I moved was not the real me or my version who is able to play for big titles," Thiem said. "It's just not good enough at the moment. It's a very tough situation."

ZVEREV MAINTAINS PERFECT FIVE-SET RECORD

Zverev appeared set to join world number four Thiem in falling at the first hurdle when he fell two sets down to German compatriot Oscar Otte, the qualifier making just his third main draw appearance at a slam and playing in his first tour-level match this year.

But Zverev racked up 50 winners as he fought back to claim a 3-6 3-6 6-2 6-2 6-0 victory, stretching his perfect record in five-setters at Roland Garros to seven matches.

It marked the second time Zverev has produced a turnaround from two sets down, having achieved that feat to reach the US Open final by beating Pablo Carreno Busta, who overcame Norbert Gombos in straight sets on Sunday.

TSITSIPAS SEES OFF CHARDY

In terms of laying down an early marker, it was Tsitsipas who perhaps produced the greatest statement of intent on day one, though the coronavirus restrictions meant there were no fans on court to see it.

Had there been spectators, they might have helped Chardy prevail in the key moments in a tight opening set that saw Tsitsipas save a set point and then win it on a tie-break.

From there, the fifth seed was always in command and surged to a 7-6 (8-6) 6-3 6-1 triumph.

HURKACZ HIT BY BOTIC BLITZ

Roberto Bautista Agut and Karen Khachanov were routine winners on day one while Cristian Garin prevailed in four sets against Juan Ignacio Londero.

Dan Evans, the 25th seed, went out as he lost in four sets to Miomir Kecmanovic and injury ended the hopes of 16th seed Grigor Dimitrov.

Dimitrov had three match points at 6-2 6-4 5-1 against American Marcos Giron but let them slip and promptly lost the next eight games before retiring with a back problem.

Also crashing out was Hubert Hurkacz, the 19th seed undone by Dutch qualifier Botic van de Zandschulp, who came from two sets down in a stunning display.

Van de Zandschulp won seven of his 14 break points and reeled off 55 winners in an incredible turnaround to seal a 6-7 (5-7) 6-7 (4-7) 6-2 6-2 6-4 win.

Dominic Thiem crashed out of the French Open in the first round as the US Open champion and two-time Roland Garros finalist suffered a stunning loss to Pablo Andujar.

Thiem looked to be easing to a routine win on the opening day of main draw singles action in Paris, having claimed the first two sets.

However, Andujar staged a remarkable fightback to end the world number four's bid for a third appearance in the final.

The Spaniard claimed a 4-6 5-7 6-3 6-4 6-4 win, his first victory over a top-five opponent at the age of 35.

Thiem hit 66 winners over the course of an epic that lasted four hours and 28 minutes, but his efforts were undermined by 61 unforced errors to Andujar's 47.

It is another low point in an underwhelming year to this point for the fourth seed, who has won only nine of his 17 matches in 2021.

And it is a result that opens up the bottom half of the men's singles draw, with Novak Djokovic, Rafael Nadal and Roger Federer all in the top half.

Andujar, who has never progressed beyond the third round at Roland Garros, will face Radu Albot or Federico Delbonis in round two.

Roger Federer's extra work on the practice courts could not see him past Pablo Andujar as he lost at the Geneva Open in just his third match of the year.

ATP Tour great Federer did not feature after the Australian Open in 2020, instead recovering from knee surgery.

His comeback came in Doha in March, but defeat to Dan Evans after an opening victory over Nikoloz Basilashvili prompted the 20-time grand slam champion to withdraw from subsequent tournaments.

Federer instead refocused on practice yet was still cautious to forecast a return to his best standard ahead of playing this week's event in Switzerland.

"There are question marks around my level," he explained, and Tuesday's answers were underwhelming in front of a small home crowd.

Federer went down 6-4 4-6 6-4 to Andujar, despite leading by a break in the decider.

Andujar reeled off the final four games of the match to claim his first top-10 win since 2015 against David Ferrer in Barcelona.

For Federer, this was a rare failure on Swiss soil, a 32-match winning run ended by Andujar.

Juan Martin del Potro, way back in 2013 at the Swiss Indoors Basel, had been the most recent victor against Federer in his home country.

Andujar could now face Dominic Stephan Stricker in the last eight after the 18-year-old wildcard stunned Marin Cilic on his ATP Tour debut.

A 7-6 (7-5) 6-1 victory for Federer's young countryman set up a meeting with Marton Fucsovics, who beat qualifier Henri Laaksonen in straight sets, for the right to play Andujar.

Besides Federer, Fabio Fognini was the only seed involved on Tuesday but eased past Guido Pella 6-2 6-2.

Elsewhere, at the Lyon Open, French stars continued to fall, although fifth seed Gael Monfils at least came past lucky loser Thiago Seyboth Wild.

After all four Frenchman involved on Monday lost, Richard Gasquet was the only other home hopeful to advance 24 hours later – and he was playing compatriot Gregoire Barrere.

Jo-Wilfried Tsonga fell at the hand of Tommy Paul, while wildcard Benjamin Bonzi went down to Karen Khachanov.

There was an upset, meanwhile, as seventh seed Felix Auger-Aliassime was toppled in three sets by Lorenzo Musetti.

It proved to be a tough day for home players at the Lyon Open as Roger Federer found out who he will face first in the main draw in Geneva.

All four Frenchmen in action on Monday were knocked out in Lyon, including 2018 finalist Gilles Simon.

Aljaz Bedene knocked out the world number 68 in straight sets, two breaks of serve in each enough to secure a 6-2 6-3 triumph after one hour and 13 minutes on court.

Sebastian Korda overcame both Pierre-Hugues Herbert and the rain to progress to the second round, a 7-6 (7-5) 6-4 triumph wrapped up quickly following a delay.

Having been 5-4 ahead in the second set when play was halted, Korda clinched victory on his first match point upon the resumption, in the process snapping a run of four successive defeats on the ATP Tour.

Cameron Norrie will take on top seed Dominic Thiem next after his 7-5 6-3 win against Corentin Moutet, while Ugo Humbert let slip a one-set lead as he was beaten by Yoshihito Nishioka.

Meanwhile, at the Geneva Open, there was a maiden victory for French teenager Arthur Cazaux as he came out on top against compatriot Adrian Mannarino.

The 18-year-old held his nerve in a decider despite this being his first tour-level contest; Reilly Opelka or Pablo Cuevas will be next up in the event.

As for Federer, he will begin his campaign on Tuesday, the 39-year-old having played just two matches so far this year after undergoing two knee operations in 2020.

The Swiss superstar now knows he will be up against Pablo Andujar, who overcame Australia's Jordan Thompson in straight sets.

Tennys Sandgren saw off Salvatore Caruso 6-3 6-4, while Dominik Koepfer came through a tight tussle with Benoit Paire that spanned two hours and 39 minutes.

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