March 26, 2014
Dominika Cibulkova reacts after winning a second set tiebreak against Agnieszka Radwanska (not pictured) on day ten of the Sony Open at Crandon Tennis Center. (USA TODAY Sports: Geoff Burke)
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Cibulkova upsets Radwanska to reach Miami semis
Defending champion Serena Williams closed in on a seventh Sony Open title with a 6-2 6-2 quarter-final demolition of German Angelique Kerber on Tuesday, a win that came as the Crandon Park tennis facility was locked down due to a bomb scare.