The tennis star thinks Maria Sharapova "might be perceived by the public as nicer."
Responding to comments Nastase made about Williams’ unborn child, the tennis player quoted Maya Angelou.
Williams won her 23rd Grand Slam singles title at the Australian Open in January, when she was already close to two months pregnant.
Serena defeats sister Venus at the Australian Open.
Four all-time tennis greats will clash this weekend in the Australian Open finals.
The sisters last contested the Wimbledon 2009 final.
Williams is tied with Steffi Graf on 22 Grand Slam singles titles.
The sporting icon has some words of advice for all of the "incredible women" striving for excellence.
The 22-times Grand Slam winner was troubled by a knee injury.
Serena Williams ties Steffi Graf's Grand Slam title record with Wimbledon victory.
Williams' 22nd major title earned with a 7-5, 6-3 win over Germany's Angelique Kerber.
Serena Williams needs one more Slam to equal Steffi Graf’s record haul, and Patrick Mouratoglou thinks he can get the tennis star over that line.
Williams had been trying to win her record 22nd major title before being stopped by the fourth-seeded Spaniard.
This is an unusual way to prepare for an important match.
Raymond Moore said that women should 'bow down' to Federer and Nadal..
The American is one major behind the retired star.
Rising British star's run ends at the semi-final stage in Melbourne as Serena Williams powers on.
The multiple Grand Slam winner failed to turn up to a press conference after the defeat.
"He began to run but I was too fast," Williams wrote.
Two matches away from the mystical Grand Slam, the greatest tennis player alive falls to an unseeded opponent.
The tennis star was the No. 1 seed in the women's semifinals.