Agustina Serio reached the quarterfinals and won the consolation doubles with Angeles de los Rios.
Birowski claimed the singles title in Draw 3 as well as a consolation win in doubles.
UTA picked up three titles in 2015 and return three of the four winners this season.
Angeles de los Rios and Anna Wichert each went 5-1 in the opening weekend of the season.
The UTA men won a school-record 18 matches and claimed the SBC crown in '16, while the women won 17 and reached the SBC semi's.