Janice Tjen vs Yuliia Starodubtseva — R16 — Monterrey Open

Seeded seventh and the betting market's pick at 57 percent, Janice Tjen leaves the Monterrey Open having converted one break point in six, four of them coming and going in the opening set alone. Starodubtseva saved five of the six she faced and held eight of nine service games, the NCAA-built baseliner extending rallies until the seed missed. The break that decided it landed in game 7 of the second set, for 4-3, right after Tjen had leveled at 2-2. The 78th-ranked Ukrainian came in 3-6 on hard courts this season with six straight losses before this week, and 1 hour 50 minutes of return pressure turns that into a quarterfinal.