Connecticut
Top seeds Agnieszka Radwanska and Dominika Cibulkova booked their semifinal berths at the Connecticut Open.

Poland’s Radwanska, the defending champion, defeated eighth seed Peng Shuai of China 7-5 6-3 to advance to the final four.

Second seed Cibulkova of Slovakia beat sixth seed Anastasia Pavlyuchenkova of Russia 7-5 6-4.

Peng and Radwanska had split six prior encounters, with Peng taking their most recent meeting at Indian Wells in March. But Radwanska, still seeking her first title of the year, emerged with a victory in just under two hours to set up a semifinal meeting with Australian Daria Gavrilova. Gavrilova defeated Belgian qualifier Kirsten Flipkens 6-2 6-4.

It was the third meeting of the year between Cibulkova and Pavlyuchenkova, who had split two prior contests in 2017. Having narrowly won the opening set, Cibulkova powered to a 5-0 lead in the second, then turned back a furious rally from the Russian to win in just over two hours. “I was playing very well in the whole second set, but then she started playing even better,” Cibulkova said.

“I had four match points, and she hit an ace every time so I couldn’t do much about it. But I just kept fighting and I said to myself, ‘OK, this one’s going to be yours’.”