Top seed Elena Dementieva reached the semi-finals of the Family Circle Cup on Friday when Dominika Cibulkova retired in the second set because of a left thigh strain. The Russian, who had lost only four games in her two previous matches, was leading 6-4 1-0 in the quarter-final when the seventh-seeded Slovakian retired. Olympic champion Dementieva will next meet Denmark's Caroline Wozniacki, who beat France's Virginie Razzano 6-2 6-0.   read more »