Danielle Dominates  - 

Video: Day 4 Recap – Pegula survives epic as Keys and Bencic also go three

Quarterfinal places were booked across eight singles matches on a busy Day 4 at the Credit One Charleston Open, with Belinda Bencic, Madison Keys and Ons Jabeur all winning – though Victoria Azarenka faced defeat. Watch the recap of a dramatic day of action.