Serena Williams out of China Open draw

American great Serena Williams was left out of the China Open tennis draw on Friday as reports said she's called time on her season following her meltdown at the US Open.

Williams' name, along with that of her sister Venus, did not appear on a list of 64 players ahead of the tournament's start on Saturday in Beijing.

It comes less than three weeks after the tempestuous US Open final, where Williams accused the umpire of sexism in an angry rant during her 6-2, 6-4 defeat to Japan's Naomi Osaka.

In extraordinary scenes, Williams went into a tailspin after a warning for receiving coaching from the sidelines, smashing her racquet and being docked a point and then a game.

She later said that she wanted to "move on" from the incident, but maintained that women players could not get away with "even half of what a guy can do".

"Right now we are not, as it's proven, in that same position," she told Australia's Channel Ten.

"But that's neither here nor there. I'm just trying most of all to recover from that and move on."