Watch Jack Sock wield racquet in a tic-tac-toe showdown

ATP star Jack Sock and TikTok elite Alex Presley took part in a tic-tac-toe challenge for the ages, with a setup against a tennis court's back fence.

With tennis balls and footballs flying, the duo found the fun in the COVID-19 era's more mundane times. Presley is actually famous in part for his family's "Quarantine Olympics."

Presley's more than two million TikTok followers surely enjoyed the video, with more than 26,000 likes, twice Sock's take on Instagram. Ultimately Sock reigned victorious, delivering a backward, between-the-legs shot at top-right that gave him three hits in a row for a stylish tic-tac-toe.

Sock, a career-high No. 2 in doubles and No. 8 in singles, including ATP Finals appearances in both disciplines, is on the bound with his singles career. Look for a strong push on North American hard courts, wherever tennis is happening in 2021.