Venus Williams was knocked out of the Volvo Car Open in Charleston, S.C., on Thursday, losing to Yulia Putintseva, 7-6 (5), 2-6, 6-4. Williams, seeded third, became the fifth of the top eight seeds to lose before the quarterfinals. Top-seeded Angelique Kerber beat Kristina Kucova, 6-2, 6-3.

■ The defending champion Jack Sock beat Matthew Barton, 6-2, 7-6 (5), to reach the quarterfinals of the United States Men’s Clay Court Championship in Houston. (AP)