On Day 3 of the WTA Finals, Madison Keys took on Dominika Cibulkova and pulled off the best save so far in the tournament. Keys was at full stretch and managed a passing shot winner against the Slovakian on her way to a 6-1, 6-3 win.

With her maiden Singapore victory, the American improved her record in the Red group to 1-1. She'll face top seed Angelique Kerber on Thursday.

The WTA Finals is in full swing as the best of the best in women's tennis fight it out for the year-end crown, with doubles beginning on Thursday.

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