Sloane Stephens knocked out of Citi Open in first-round upset
No. 1 seed Sloane Stephens lost, 6-2, 7-5, in straight sets to Sweden's Rebecca Peterson in the first round of the Citi Open on Tuesday.
After losing the first set, Stephens took an early 2-0 lead in the next one. Peterson tightened it to 5-5, then took it the rest ...