Serena Williams' husband made a huge romantic gesture to welcome the tennis star back to the court.

Alexis Ohanian produced a series of billboards lining the route to Williams' training center in Palm Springs, which featured their 5-month-old daughter Alexis Olympia.

Each billboard featured a different picture of their daughter, each with a word ultimately reading "Greatest Momma of All Time".

Read more: Serena Williams' daughter Alexis Olympia poses in cute Instagram pictures

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The final billboard showcased the mother-daughter-duo with the words "Serena Williams G.M.O.A.T. - Alexis Jr + Sr".

Read more: Tennis: Serena Williams gives birth to baby girl

Ohanian posted the series of billboards on his Instagram with the caption, "These just went up on alongside I-10 into Palm Springs. @olympiaohanian & I wanted to welcome her back to tennis. Designed them myself, with some help from Jr. #GMOAT".

"Literally am crying, This is so sweet. I love you," Williams commented.