Issei Okamura defeated Peter Balla 6-2 6-2 in the Turkey F4 qualifying round of 32 on hard.
Okamura I. took it in straight sets.
Issei Okamura beat Peter Balla 6-2 6-2. Umpiry, "Issei Okamura vs Peter Balla — Turkey F4 Qualifying Round of 32", https://umpiry.com/match/2016-01-25/balla-vs-okamura-turkey-f4-q32?utm_source=cite (as of 25 January 2016).