
Amanda Anisimova battled from a set down at the WTA Finals for the second match in a row to beat Iga Swiatek and claim a place in the semi-finals alongside Elena Rybakina.
In a high-quality contest and the longest match of the tournament so far, Anisimova produced her second comeback of the week to defeat Swiatek 6-7 6-4 6-2 in two hours and 37 minutes, knocking the World No 2 out of the tournament.