Tennis legend reveals what Jannik Sinner did behind the scenes at Roland-Garros after Carlos Alcaraz defeat that stunned onlookers

Legendary tennis coach Darren Cahill has revealed what Jannik Sinner did moments after his French Open final defeat to Carlos Alcaraz that surprised onlookers.

Sinner lost a five-hour epic 6-4, 7-6, 4-6, 6-7, 6-7 to Alcaraz at Roland-Garros last month.

It was his first defeat in four Grand Slam finals, with the Italian dropping just two sets in his previous three finals.

Alcaraz saved three championship points on the way to arguably the greatest victory of his career.

The length of the match appeared to take its toll on Sinner, judging by the light-hearted thing he did minutes later.

According to Cahill, who has coached Sinner to all three of his Grand Slam final victories and previously mentored Simona Halep and Andre Agassi, the Italian walked past a candy jar as he was leaving the arena.

While tradition indicates that each player takes a small number of candies with them, Sinner instead decided to take the whole jar.

Speaking on ESPN, Cahill explained: "About a half an hour afterwards, he went and did the press, he was walking to the transport, we had this big bus where we all sit in.

"And for the players, they have this candy jar, that you can take a couple of candies as you're walking out. He took the whole jar. He grabbed the glass jar, took the candies.

"He'd been on a strict diet for two weeks, and that was it - the diet was out of the window. In the car, he was handing candies out to everyone, he was laughing, he was giggling.

"He moved on pretty quickly [from the defeat]. It'll be interesting to see how he moves on here [at Wimbledon], because this will be the big test."

Sinner got off to a positive start in SW19 on Tuesday, defeating compatriot Luca Nardi in straight sets 6-4, 6-3, 6-0.

He takes on Aleksandar Vukic of Australia in round two on Thursday evening.

Sinner and Alcaraz are on opposite sides of the draw so, should they face each other at this year's Wimbledon, the pair will have reached yet another Grand Slam final.