![Dominika Cibulkova celebrates victory against Angelique Kerber in the WTA Finals in Singapore.](/web/20161031183521im_/http://www.watoday.com.au/content/dam/images/g/s/e/7/d/i/image.related.landscape.460x307.gsejuo.png/1477885099206.jpg)
WTA Finals: Dominika Cibulkova upsets Angelique Kerber in Singapore
The world-beating season few had predicted for Angelique Kerber has fallen one match short of ending on the same type of high note as it began, with the top seed upstaged 6-3, 6-4 in the WTA Finals by an opponent, Dominika Cibulkova, now celebrating her own belated career peak.