But a headline from The Punch Newspapers on 12 February, about Ohanian taking on daddy duty, thoroughly unimpressed Twitter users. It read: "Serena Williams' multimillionaire husband babysits as wife returns to court."
The definition of "babysitting" in the Oxford Dictionaries is: "A person who looks after a child or children while the parents are out."
Red Durkin tweeted: "You misspelled "parents his own god damn child."" Jaffe Joffer wrote: "Remember folks, it's "baby sitting" when the dad's involved." Countless others commented that he was simply being a father, doing what a parent is supposed to do, and that it is not called babysitting when it is your own child.
When some people praised Ohanian, others hit back. One user said: "Dis Alexis guy can't stop marveling me! Here's a guy who can get a nanny to do d job but takes care of baby Alexis, bless ur great soul!" But he received this reply: "Hope it's this marvelling when Serena decides to feed her baby as well. Because you know she's a millionaire as well right?"
Many feminists were also annoyed that the headline referred only to Reddit co-founder Ohanian's wealth, when Williams is worth more than 15 times her husband. The tech magnate is worth an estimated $9m to Williams' $150m in 2016.
Durkin tweeted: "The headline refers to him as a 'multimillionaire' as though his wealth is what distinguishes him from his partner, despite being worth less than half of the amount of money she takes in a year & less than 10% of her total estimated net worth."
Rhianne Connor said: "Don't forget that he's a 'millionaire' while she's a 'wife'. I mean, it's not like she's a millionaire.....oh, wait."
Another user said: "I like how they described him as "multimillionaire", while Serena is described as "wife" as if she's not a multiple-multimillionaire herself! Just gonna reduce a multi-grandslam champ! To a court wife."