Some of the biggest stars put their racquet skills to good to take part in the Miami All-Star Tennis Charity Event, an exhibition at the Ritz Carlton in Key Biscayne.

Ahead of the Miami Open, Serena Williams, Simona Halep, Frances Tiafoe and Halep’s coach Darren Cahill took part in the event benefiting ACEing Autism, a charity connecting children on the autism spectrum with the sport of tennis.

So much fun at the 9th Annual All-Star Tennis Charity Event with @FTiafoe@serenawilliams@Simona_Halep@darren_cahill – thank you for supporting our @aceingautism mission and showing how tennis positively impacts kids with autism – at @RitzCarlton with @cdrysdaletennis😀

Nick Kyrgios came out to support the cause and connect with the children of ACEing Autism.

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The 9th Annual Tennis for Charity was a huge success!

Thanks so much to our players @SerenaWilliams, @Simona_Halep, @FTiafoe, @NickKyrgios, @MattReid12345, @Darren_Cahill and many more!

All of the stars had a blast during the day, which featured a round-robin tournament and pro-am for the attendees.

World No. 1 Halep and eight-time Miami champion Williams even shared a big laugh together.

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She’s the greatest player of all time and one of the greatest athletes of all time; we were so happy to have @SerenaWilliams back at Tennis for Charity again this year!

Williams was enjoying being back on the court in South Florida but her Miami Open campaign was cut abruptly short by Naomi Osaka on Wednesday.