Bethanie Mattek Sands defeated Na Li 5-7 6-3 6-2 in the Roland Garros round of 64 on clay. The upset overturned the form book — Na Li came in leading the head-to-head 2–0, defending last year's round of 16. Bethanie Mattek Sands claimed a first win over Na Li in three meetings, narrowing the head-to-head to 2–1.
Mattek Sands B. came through in three sets.
Mattek Sands B. and Li N. faced 3 of the same opponents in the last 12 months. Mattek Sands B. went 1–2 (33%) against them, Li N. 3–1 (75%). Li N. came out better against 2 of 3 comparable opponents, Mattek Sands B. against 0.
Only 3 common opponents — small sample, treat as indicative.