SINGAPORE - The won the title together a year ago, and they could be on opposite sides of the net in the final 12 months later.
Timea Babos and Andrea Sestini Hlavackova, who return to the BNP Paribas WTA Finals Singapore presented by SC Global as defending champions but with different partners, were placed on opposite sides of the draw in the current teams as all eight were placed on Tuesday.
Babos, the No.2 seed with Kristina Mladenovic, anchors the bottom half.
They will open their week against No.5 seed Gabriela Dabrowski and Xu Yifan in the quarterfinals, while No.3 seeds Sestini Hlavackova and Barbora Strycova will open against Andreja Klepac and María José Martínez Sánchez.
"It's very exciting for us [to be here together]," said Mladenovic. "We split because I had a plan for the Olympics, and it's just amazing to be back. She's my best friend, so to find her back on the court and have this amazing season taking our first Grand Slam together and all the amazing results throughout the year."
The top seeds are also Czechs, as Katerina Siniakova and Barbora Krejcikova lead the way in the draw. The young compatriots clinched the year-end World No.1 ranking earlier this week, are looking for their third big title of the season, having also won the French Open and Wimbledon.
They will face No.7 seeds Nicole Melichar and Kveta Peschke in the quarterfinals.
"It's an amazing feeling to achieve all of this - to win two Grand Slams, qualify here than be No.1. Sharing this position is perfect," Krejcikova said. "It's a perfect year."
Siniakova qualified for last year's WTA Finals with Lucie Hradecka, but was unable to play due to an injury to Hradecka.
She added: "It's really exciting. This tournament is amazing and they care so much about everything, so I think we cherish every moment here."
The last doubles quarterfinal will see No.6 seeds and US Open champions Ashleigh Barty and CoCo Vandeweghe take on No.4 seeds Elise Mertens and Demi Schuurs.