A semi-final spot at the WTA Finals is at stake on Wednesday when Iga Swiatek and Amanda Anisimova tussle in the final round-robin match in the Serena Williams Group.

Both players enter the crucial contest with a 1-1 record after two matches, and the winner will advance to the last four along with Elena Rybakina, whose victory over the two women means she progresses as group winner.

Match preview

Swiatek may have suffered nightmares after her uncharacteristic collapse against Rybakina on Monday, after claiming the opening set and seemingly cruising.

The Polish superstar committed six double faults to take the first set after a solitary break of serve; by the end of sets two and three, though, that number had risen to 42, with 36 in the second and decider.

Monday’s loss means that the

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