"I'm not where I want to be, but I'm getting there", she said.
She's playing under a protected ranking of 22nd and hasn't been unseeded at a tournament since 2011 in Cincinnati.
"I wasn't going to play (the French Open) unless I had a TUE because if you remember that year I was incredibly sick". "My comeback could not have come on a better day and I decided I wanted to do something different let you all be apart of my long journey back".
She blasted four aces and won 63 per cent of her first-serve points against Diyas, who claimed her first WTA title previous year in Tokyo. "I'm really happy about that".More news: South Carolina's Justin Minaya passes first postseason test
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Williams, with husband and Reddit co-founder Alexis Ohanian looking on, was only two points from dropping the opening set but showed the sort of poise that earned her 23 Grand Slam singles titles. Williams could potentially meet older sister Venus in the third round if both win their next matches. "Now that she is not dominating, women's tennis is more interesting".
It was an emotional entrance once more for Williams - this time not anticipating the crowd's reaction but more that she was missing Olympia, although she admitted it was easier playing a night match knowing her daughter and play-pal was asleep. One of them has a photo of Williams and their daughter and carries the caption "G.M.O.A.T", denoting the phrase "greatest mother of all time". "It's absolutely my favorite thing", she said.
"It was incredible. It's been over a year, and a kid later, and I get to go home to her now, and I'm excited about that", the record Grand Slam singles titles victor said after the match. "Just holding her and the way my heart skips a beat".
"I think timing [was the toughest part]".