Reddit co-founder Alexis Ohanian recently welcomed wife Serena Williams back to tennis with a series of billboards in Palm Springs, Calif.

Ohanian posted photos of his gesture Tuesday on social media.

"These just went up on alongside I-10 into Palm Springs. Junior & I wanted to welcome her back to tennis," Ohanian wrote on the posts. "Designed them myself, with some help from baby O [and assist from Initialized startup, AdQuick, where I searched + bought the billboards]. #GMOAT @ Palm Springs, California."

The billboards featured several photos of baby Alexis Olympia Ohanian, on a series reading "Greatest. Momma. Of all time." The final billboard he shared read "Serena Williams G.M.O.A.T. [Greatest Momma Of All Time] - Alexis Jr + Sr."

Williams, 36, will compete at the BNP Paribas Open from March 5 through March 18 at Indian Wells Tennis Garden in Indian Wells. Calif. The 23-time Grand Slam champion returned to the court for the first time in December, losing in three sets to Latvian Jelena Ostapenko in Abu Dhabi. Before that appearance, Williams hadn't played competitively since winning the 2017 Australian Open. She was expected to participate in the 2018 Australian Open, but pulled out of the tournament before it began.

Alexis Olympia was born on Sept. 1, while Williams and Ohanian were married in November. Olympia and her dad were in the stands in early February to watch Williams and sister Venus Williams compete in a doubles match at the 2018 Fed Cup in Asheville, N.C.

UPI