Kerber, Cibulkova reach final four

SINGAPORE— Angelique Kerber helped Dominika Cibulkova reach the semifinals of the WTA Finals on Thursday. Kerber beat Madison Keys 6-3, 6-3 to finish 3-0 in the round. Cibulkova beat Simona Halep 6-3, 7-6 (5) earlier in the day. Svetlana Kuznetsova, who is 2-0 in the White Group, has already qualified for the semifinals. The last spot will be decided Friday when defending champion Agnieszka Radwanska plays Karolina Pliskova.