Serena Williams and her sister Venus attended the A Conversation with Champions event, which took place at Lotte New York Palace on Thursday.

The tennis stars, aged 40 and 42, respectively, were joined by fellow pro athletes like Naomi Osaka, Rafael Nadal and Nick Kyrgios.

The sisters’ appearance at the event comes just weeks after Serena shocked fans by announcing that she would be retiring from the sport.

Front and center: Serena Williams and her sister Venus attended the A Conversation with Champions event, which took place at Lotte New York Palace on Thursday

Serena wore a sleeveless yellow top that showed off her chiseled arms while sitting on stage during the event.

The much-celebrated athlete also donned a stylish black mini skirt and matching sandals.

Her beautiful brunette locks were partially tied back and fell onto her shoulders.

Venus opted for an eye-catching green cardigan that was worn over a white t-shirt.

Retirement: The sisters’ appearance at the event comes just weeks after Serena shocked fans by announcing that she would be retiring from tennis

Champions: The tennis stars, aged 40 and 42, respectively, were joined by fellow pro athletes like Naomi Osaka, Rafael Nadal and Nick Kyrgios

The professional tennis player also rocked a stark white cap and a matching pair of sneakers.

Her gorgeous dark brunette hair cascaded onto her shoulders and contrasted perfectly with the lighter tones of her outfit.

Serena announced that she would be retiring from tennis in an interview that was published by Vogue earlier this month.

Stylish: Serena wore a sleeveless yellow top that showed off her chiseled arms while sitting on stage during the event. The much-celebrated athlete also donned a stylish black mini skirt and matching sandals

During the sit-down, the athlete expressed that she had found new priorities away from the sports world.

She expressed that she was ‘evolving away from tennis, toward other things that are important to me.’

Serena then remarked that she was planning on prioritizing her family in the future.

New direction: Serena announced that she would be retiring from tennis in an interview that was published by Vogue earlier this month. During the sit-down, the athlete expressed that she had found new priorities away from the sports world

Family matters: Serena then remarked that she was planning on prioritizing her family in the future

‘I definitely don’t want to be pregnant again as an athlete. I need to be two feet into tennis or two feet out,’ she said.

Serena made a point of stating that she did not take the decision to leave tennis lightly.

‘I hate that I have to be at this crossroads. I keep saying to myself, I wish it could be easy for me, but it’s not. I’m torn: I don’t want it to be over, but at the same time I’m ready for what’s next,’ she said.