JANNIK SINNER stepped in to help a fan as his ATP Finals opener was suspended for a medical emergency. The world No1 began the year-end tournament in his homeland Italy with a 6-3 6-4 win over Australia's Alex De Minaur on Sunday. However, midway through the second set, play was suddenly halted as De Minaur attempted to survive three break points on his serve.

The players and umpire were alerted to a spectator being taken ill. And Sinner , 23, sprung into action to offer support. The Italian immediately asked for a bottle of water and then handed it over to the front row of tennis fans so it could be passed back.

READ MORE ON TENNIS The classy gesture promoted a warm round of applause from his adoring supporters. Commentator Lee Goodall said: "I think we have a medical situation in the crowd so understandably both players just taking a moment to make sure that the necessary personnel arrive quickly and deal with the situation as swiftly as possible. "Always worrying moments, these, in big stadiums.

"That's a nice touch from the umpire and Sinner quick to lend a helping hand." Most read in Tennis CASINO SPECIAL - BEST CASINO WELCOME OFFERS Sinner and chair umpire Renaud Lichtenstein were then picked up by the courtside microphones discussing the conditions inside the Palasport Olimpico arena - before De Minaur also joined the conversation. Lichtenstein said: "I don't know, I didn't see.

I saw the people moving. It's warm for them as well." Sinner replied: "I feel like the air .