Diaz, playing No. 1 singles and doubles, led the Hornets to a 5-3 season opening victory over PSU-Altoona Saturday evening.
The Haymarket native paired with Bryan Harris to win 8-0 at No. 1 doubles before earning a 6-1, 6-0 victory over Jimmy Gillespie at No. 1 singles.
The singles victory put SU two wins from clinching the match.