With two more spots in the singles field at the inaugural Shiseido WTA Finals Shenzhen sealed last week, the final weeks of the WTA season will determine the last two qualifiers.

Naomi Osaka and Petra Kvitova sealed their spots in Shenzhen last week based on their results at the China Open, and it will come down to three players for the final two spots.

Serena Williams, inactive since the US Open, withdrew from the China Open with a knee injury, and currently sits at No.8 in the Race after being passed by defending WTA Finals champion Elina Svitolina, who reached the quarterfinals in Beijing and now sits in seventh.

Immediately outside the Top 8 are No.9 Kiki Bertens, just 65 points behind Williams, and No.10 Belinda Bencic, both of whom will seek to make up ground this week at the Upper Austria Ladies' Linz. 

Osaka, who already qualified for the season-ending championship by virtue of reaching the semifinals in Beijing, went two matches better en route to sealing her second straight title in the Asian swing.

Read more: Osaka becomes fifth qualifier for Shiseido WTA Finals Shenzhen

By virtue of her victory at the Premier Mandatory event, the Australian Open champion surpasses Wimbledon winner Simona Halep, and US Open champion Bianca Andreescu, whom she defeated in the quarterfinals in Beijing, to No.3 in the Race leaderboard. 

Here's how the Porsche Race to Shenzhen stacks up for the week of October 7: