Serena Williams does the business on and off court and Osaka scrapes through

• Williams solved business emergency' before beating Sabalenka
• Osaka saves two match points in 4-6, 6-4, 7-5 win over Muguruza

Most players would be content to rest the day before a big match, but not Serena Williams. The 23-times Grand Slam champion said she had to step in to avert an emergency" at her clothing line on Saturday, a day ahead of her Australian Open last 16 match against Aryna Sabalenka.

Williams, who beat the Belarusian 6-4, 2-6, 6-4 to reach the quarter-finals, said the situation was so crazy". As CEO, I had to kind of step up a little bit. I was on the phone with our designer making final orders and deciding how much fabric we need for our new collection," she added.