Valentin Sanon defeated Boris Vallejo 6-4 6-4 in the USA F9 round of 64 on hard.
Sanon V. took it in straight sets.
Valentin Sanon beat Boris Vallejo 6-4 6-4. Umpiry, "Valentin Sanon vs Boris Vallejo — USA F9 Round of 64", https://umpiry.com/match/1999-06-28/sanon-vs-vallejo-usa-f9-r64?utm_source=cite (as of 28 June 1999).