He went out after a 6-3, 6-0, 6-4 defeat by Sinner on Court Philippe Chatrier but it was not long before he began planning his immediate future.
'Beautiful draw': Retiring Gasquet meets Sinner in French Open swansong
Three-time champion Novak Djokovic battled past Frenchman Corentin Moutet in a match that lasted more than three hours on Thursday.
French veteran Richard Gasquet was also among eight men given wild-card entries.
World No 1 Iga Swiatek overcame a strong early challenge from former champion Sofia Kenin to reach the second round of the Australian Open
Teenager Andreeva shows her mettle, Pegula advances at French Open
Jannik Sinner navigated mild turbulence for a winning return to Grand Slam tennis as the world number one launched his hunt for a maiden French Open trophy.
On the anniversary of the day he first walked on to the Roland Garros court 20 years ago, Rafael Nadal returned as a hero to be celebrated by a crowd that has always embraced him as one of their own.
The French Open said it would also honour its 2000 women's champion Mary Pierce as well as fellow local favourite Richard Gasquet, who will retire after the tournament this year.
Defending champions Iga Swiatek and Carlos Alcaraz powered into the second round of the French Open on Monday.
Shapovalov made a brisk start and raced to a 3-0 lead before Gasquet responded with a mix of aggressive backhands and clever drop shots to reel off five consecutive games.
Richard Gasquet celebrated his 19th birthday by winning final of the Nottingham Open
Gauff cruises past Zidansek to reach French Open third round
Rafael Nadal beat Richard Gasquet 3-6, 6-2, 6-3 in the exhibition game in Kuala Lumpur.
France's Richard Gasquet ended Andy Murray's Masters Cup hopes by beating the British number one 6-3, 0-6, 6-4 in the Paris Masters Series quarter-finals on Friday.
Kristina Mladenovic and Richard Gasquet beat Coco Vandeweghe and Jack Sock of the United States on Saturday to win France's second Hopman Cup title in Perth.
Frenchman Richard Gasquet sounded a warning to Wimbledon champion Roger Federer after beating Swede Jonas Bjorkman in the final.
Nadal will meet defending champion Guillermo Coria in the final of the Monte Carlo Masters.
Richard Gasquet sent French Open champion Stanislas Wawrinka flying out of Wimbledon on Wednesday, winning the battle of the slingshot backhands 6-4, 4-6, 3-6, 6-4, 11-9 to reach the Wimbledon semi-finals for the second time.
Embattled French tennis player Richard Gasquet, who tested positive for cocaine in March, said on Friday he had never knowingly used the banned substance.
The Richard Gasquet Foundation will operate in two ways: use sport to bring underprivileged youths back to health and enable them rediscover the joys of life, and use sport as a way to build a future.
Top seed Richard Gasquet easily beat fellow-Frenchman Fabrice Santoro while Belgian Olivier Rochus got the better of Rainer Schuettler in the semi-finals at the Kingfisher Airlines Mumbai Open.
The 29-year-old Frenchman crashes 'top-four' party to set up semi-final against World No Djokovic
Andy Murray remained on course for a maiden Paris Masters title after the Briton saw off local favourite Richard Gasquet on Friday to reach the semi-finals with a 7-6(7), 3-6, 6-3 victory.
Richard Gasquet won his first ATP title in more than two years when he continued his domination of Gilles Simon by swatting aside his French compatriot 6-2, 6-1 to claim the Thailand Open on Sunday.
French tennis player Richard Gasquet tested positive for cocaine at a tournament in Miami last month, the world number 23 said on Sunday. If Gasquet fails to clear his name, he could face a two-year suspension from the sport.
World number one Rafa Nadal set up the prospect of another mouthwatering claycourt final against Novak Djokovic after beating Richard Gasquet 7-5, 6-1 in the Rome Masters semi-finals on Saturday.
World number 14 Gasquet wrapped up the final in an hour and 26 minutes in humid conditions to win his first ATP title of the season.
Top seed Richard Gasquet needed 41 minutes to beat Fognini and set up a clash with eighth seed Stefan Koubek at the Mumbai Open.
Richard Gasquet tamed Andy Roddick's power game with some brilliant all-court tennis to upset the American number three seed 4-6 4-6 7-6 7-6 8-6 and reach the Wimbledon semi-finals for the first time on Friday.
The year's final grand slam began with an upset as 13th-seeded Frenchman Richard Gasquet was upended 6-2 6-2 6-3 by Britain's world number 84 Kyle Edmund at the U.S. Open on Monday. Gasquet, who has reached the last 16 at Flushing Meadows four times in his career, was outplayed throughout and his U.S. Open experience lasted just one hour, 41 minutes.
Marion Bartoli had barely registered on the tennis scale before but that did not stop her from destroying Justine Henin's Wimbledon dream.
Roger Federer described his Wimbledon draw as one of the toughest of his career.
Richard Gasquet scraped past French compatriot Nicolas Mahut 7-5, 4-6, 7-6 to reach the second round of the Paris Masters on a good day for the local favourites on Monday.
The International Tennis Federation (ITF) has expressed its disappointment at the Court of Arbitration for Sport (CAS) decision to clear French player Richard Gasquet of doping after he tested positive for cocaine.
Frenchman Gael Monfils overwhelmed compatriot and defending champion Richard Gasquet 6-4, 6-4 in the Montpellier International tournament final on Sunday to claim his first title in more than two years.
France's Richard Gasquet has been provisionally suspended from tennis after testing positive for cocaine, the International Tennis Federation (ITF) said on Monday. Gasquet confirmed on Sunday he had failed the test at last month's Miami tournament but has denied any wrongdoing.