Yong Il Yoon defeated Wei Jen Cheng 5-7 6-4 6-0 in the Japan 1 Masters 3 round of 16 on hard.
Yoon Y. came through in three sets.
Yong Il Yoon beat Wei Jen Cheng 5-7 6-4 6-0. Umpiry, "Yong Il Yoon vs Wei Jen Cheng — Japan 1 Masters 3 Round of 16", https://umpiry.com/match/1999-06-07/cheng-vs-yoon-japan-1-masters-3-r16?utm_source=cite (as of 7 June 1999).