Tobias Kamke defeated Ti Chen 7-6 6-2 in the US Open qualifying round of 128 on hard. The upset overturned the form book — Ti Chen came in leading the head-to-head 1–0. Tobias Kamke claimed a first win over Ti Chen in two meetings, levelling the head-to-head at 1–1.
Kamke T. took it in straight sets.
Tobias Kamke beat Ti Chen 7-6(5) 6-2. Umpiry, "Tobias Kamke vs Ti Chen — US Open Qualifying Round of 128", https://umpiry.com/match/2015-08-25/chen-vs-kamke-us-open-q128?utm_source=cite (as of 25 August 2015).