Iga Swiatek has called for an end to online abuse after receiving hateful messages following her win over Zheng Qinwen at the Cincinnati Open.
World number one Swiatek won 3-6 6-1 6-1 but received criticism after dropping the first set in the last-16 encounter.
The 22-year-old Pole appeared upset in her post-match news conference as she addressed the abuse.
"The amount of hate and criticism me and my team get after losing a set is ridiculous," said Swiatek.
"I want to encourage people to be more thoughtful when they comment on the internet.
"We all sacrifice a lot.