Serena Williams surprises fans at a public court, challenges them to a match in street clothes 🐐🎾



🎥: https://t.co/z8JgzAwEb2 pic.twitter.com/e47Ot5ktA9 — Bleacher Report (@BleacherReport) February 27, 2017

Truly anything can happen in Dolores Park. On a stroll with her partner Alexis Ohanion, the co-founder of Reddit with whom she announced her engagement in December, tennis legend Serena Williams waltzed onto the park's courts to challenge two unsuspecting players.

"Can I play winner?" Williams asks. This is devastating stuff.

TMZ has it that Williams joined the duo on court for some pics and a few shots. With knee-high boots instead of tennis shoes, she opted not to play a full set, but let's just award her the win, shall we? I mean, we're talking "greatest of all time."

Below, some footage from USA Today sports reporter Alysha Tsuji.

Serena played tennis in boots with these 2 guys she saw on a court while she was out on a walk last night. IMAGINE. pic.twitter.com/kWXrTE73M9 — Alysha Tsuji (@AlyshaTsuji) February 27, 2017

A post shared by Alexis Ohanian 🗽 (@alexisohanian) on Feb 27, 2017 at 1:48pm PST





A post shared by Serena Williams (@serenawilliams) on Jan 6, 2017 at 4:48am PST



Related: Serena Williams Announces Engagement To Reddit Co-Founder In Reddit Post