Top Seeds Stumble Early but Power Through at Charleston

Pegula loses ten straight games in the third set but rallies to reach the quarterfinals.
Kalinskaya retires due to illness against Jabeur in the quarters.
Keys and Kasatkina battle into the semis in three sets.
Defending champion Bencic extends her win streak on Charleston clay to nine matches.
Jabeur and Kasatkina face off on Friday for a spot in the final.