The chase for the final spot at the BNP Paribas WTA Finals presented by SC Global showed no signs of slowing down in week two of the Asian swing. 

Title-winners Karolina Pliskova and Kiki Bertens have their sights set on a berth in Singapore, and both threw down the gauntlet by being crowned champions last week. 

By winning the Premier-level title in Tokyo over Naomi Osaka, Pliskova moves into the last spot in the elite eight with a total of 3,601 points.

Read more: Champions Corner: 'I think this was my best serving match so far in my life' - Pliskova

However, Bertens kept pace by winning her third title of the season at the International event in Seoul, which puts her just 69 points behind the Czech headed into this week's action at the Premier 5 in Wuhan.

Elsewhere up the leaderboard, US Open champion Osaka continued to build on her momentum by reaching the final of the event in her home country for the second time in three years.

The Premier event in Tokyo was the 46th lap on the Porsche Race to Singapore.

As a result, Osaka moves up one spot in the Race to No.3 overall, displacing Petra Kvitova into No.4.

Here's how the Porsche Race to Singapore in singles stands as of September 24:

In doubles, the lone movement in the Top 8 this week sees Gabriela Dabrowski and Xu Yi-fan swap places with María José Martínez Sánchez and Andreja Klepac into the No.4 spot.

The Canadian and Chinese pair reached the semifinals in Tokyo before falling to eventual champions Miyu Kato and Makoto Ninomiya.

Here's how the Porsche Race to Singapore in doubles stands as of September 24: