Hong Kong top seed Elina Svitolina out with injury
Svitolina, who is due to play this month's WTA Finals in Singapore, has been carrying a right groin strain.
Svitolina, who is due to play this month's WTA Finals in Singapore, has been carrying a right groin strain.
Serena Williams will face 16th seed Barbora Strycova of the Czech Republic, who defeated France's Caroline Garcia in straight sets in an hour and 28 minutes.
Serena Williams will face 16th seed Barbora Strycova of the Czech Republic, who defeated France's Caroline Garcia in straight sets in an hour and 28 minutes.
