They're one big happy tennis family! Ahead of the Australian Open, stars like Serena Williams and Roger Federer got together to play Rally For Relief, a charity tournament to raise money for Australia fire relief, which brought out some of the most talented and famous faces of the sport. Not only did they raise over $4.8 million (!!), but the players got some extra work in before the Open is scheduled to kick off Jan. 20. Among those famous athletes was Naomi Osaka, who couldn't help but gush over Serena on social media following the tournament.

"Me and my mom lol," Naomi captioned her Instagram post of the photo above. So, if Serena is Naomi's mom, can I also be adopted lol? It wasn't too long ago that Serena lost to her daughter Naomi at the 2018 US Open, and they've shown nothing but unwavering support for each other ever since. Now, fresh off Serena's first title win since giving birth to her actual daughter Olympia at the 2020 ASB Classic this week, we can't wait to see how the two superstars fare at the Australian Open.

Find out how you can contribute and help those affected by the devastating bushfires in Australia here.