Amanda Anisimova fought past Iga Swiatek 6-7 (3-7) 6-4 6-2 in a winner-takes-all match at the WTA Finals on Wednesday to join Elena Rybakina in the semi-finals.

In doing so, 24-year-old Anisimova stays in the hunt for a first crown on her debut in the season-ending championship.

The stage was set for the highly-anticipated clash between the pair after Swiatek routed Anisimova 6-0 6-0 to lift her maiden Wimbledon crown in July, before the American gained revenge in the US Open quarter-finals in September.

Following a fierce start to their latest meeting and 12 straight holds of serve, Poland's Swiatek raised her level to seize control of the first set in the tiebreak, clinching it when Anisimova struck a forehand long.

The contest of attrition continued in the second set, before Anisimo

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