Janice Tjen will topple Dayana Yastremska and advance at the Monterrey Open on August 24, 2026. Tjen carries the concrete edge of their only prior meeting, a February 15, 2026 Dubai Round of 64 hard court match that she won 6-4, 6-1. Tjen entered that Dubai match ranked 46 while Yastremska was 42.…