"My whole body was sweating and I was shaking but we were happy straight away", Minella, who also lost in French Open first round, said last July.
Serena, who suffered life-threatening blood clots after giving birth, added: "Emotionally I think it's different, because, you know, I'm so emotionally attached to my daughter. I have given tennis so much, and tennis has actually given me a lot, and I couldn't be more grateful", Williams said. She said: "People would say I was born a guy, all because of my arms, or because I'm strong".
"So it is definitely a little functionality to it".
Tuesday's match was the first at a major tournament for the 23-time Grand Slam champion in 16 months. "It's a fun suit, but it's also functional so I'm able to play without any problems". Aoyoma and Kato took it to the Williams sisters right from the opening point and the Americans needed to fight back to score a 4-6, 6-4, 6-1 win.
"There has to be a very good balance between being aggressive and then being able to defend as well", Barty said of her clay court tactics. I've been wearing trousers a lot in general when I play so I can keep the blood circulation going.
Williams, the 2002, 2013 and 2015 champion in Paris, was on Tuesday playing a claycourt match for the first time since she finished runner-up to Garbine Muguruza in the 2016 final in Paris. But, you know, I'm just here enjoying myself and see what happens.
"Honestly, sometimes I still think I have to deal with it".
Williams, 36, gave birth to her daughter, Alexis Olympia Ohanian Jr., in September 2017, and has not played in a major tournament since. "She's so young, I don't really bring her".
So how much more hard is it for a mother than a father to play top level tennis?
Williams arms her weapons for battle on Thursday, when she takes on Ashleigh Barty in the Round of 64 at Roland-Garros.
"I've been injured so many times, and played on it, my body is used to adjusting".
Williams will play her second-round match against 17th-ranked Ashleigh Barty, who is very impressed by her opponent's comeback: "What Serena's done to be able to get back, along with Azarenka as well, and a lot of the other girls who are coming back after pregnancy, is a pretty wonderful thing".
"Once you start winning Grand Slams, I mean when she starts winning Grand Slams because not everyone does that, then the confidence is much higher and things go kind of - I mean it's never easy but there is more confidence and more certainty".
"The biggest difference is definitely I'm semi on time today", she continued.