Agnieszka Radwanska moved one step closer to a sixth straight appearance at the BNP Paribas WTA Finals Singapore presented by SC Global.

After reaching the final four of the Toray Pan Pacific Open, the 2015 champion moved back into the Top 4 on the Road to Singapore leaderboard, bolstering her qualification chances as the Asian Swing gets underway. Switching places with US Open runner-up Karolina Pliskova, either woman could lock up spots in Singapore with strong results at this week’s Dongfeng Motor Wuhan Open.

Pliskova reached the third round in Wuhan after a straight sets opening round win over Lucie Safarova, while Radwanska makes her Wuhan debut on Tuesday against Ekaterina Makarova.

Also into the third round of Wuhan is Simona Halep, who is ranked No.3 on the Road to Singapore leaderboard. Depending on other results, Halep could clinch her spot in Singapore should she reach the final – or perhaps the semifinal – in Wuhan. Halep is looking to qualify for the WTA Finals for a third straight year, having finished runner-up to former No.1 Serena Williams.

Tokyo champion Caroline Wozniacki rocketed up 13 spots to No.20 on the Road to Singapore leaderboard, but the former No.1 faces an uphill climb should she aspire to make it back to Singapore for the first time since 2014. After winning her first title of the season in Tokyo, the Dane would likely have to win three more titles in Wuhan, Beijing, and Moscow to have a hope of qualifying – though her chances remain solid of making a second straight appearance at the Huajin Securities WTA Elite Trophy Zhuhai.

Click here to check out the full Road to Singapore leaderboard