Tan, 24, had merely hoped to take a game or two off Williams, a seven-time Wimbledon singles champion. Instead, she won and has a chance to reach the third round of a major for the first time.

Tan, 24, had merely hoped to take a game or two off Williams, a seven-time Wimbledon singles champion. Instead, she won and has a chance to reach the third round of a major for the first time.