Germany’s Angelique Kerber clenches her fist after beating American Madison Keys in Singapore. Photo: Xinhua

Angelique Kerber gives Dominika Cibulkova a helping hand in reaching last four of WTA Finals

German’s victory over Madison Keys allows Slovakian to advance to the semi-finals of the season-ending tournament

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Germany’s Angelique Kerber clenches her fist after beating American Madison Keys in Singapore. Photo: Xinhua
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