Between them, Eric Johnson and Allie Will won five NCAA team titles.
They are seeded first in the men's and women's open divisions, respectively, in the $2,500 Rio del Oro Open/Senior/NTRP tournament, which began Friday and concludes Sunday at the Rio del Oro Racquet in Sacramento.
Both Johnson, who helped USC win three NCAA championships (2012-14), and Will, who led Florida to NCAA crowns in 2011 and 2012, received first-round byes.
But Johnson, from San Jose, did not show up for his second-round match and defaulted to Tam Duong of Rancho Cordova.
Will, who lives in Modesto, is scheduled to open against Maria Gonzalez of Sacramento today at 8 a.m. in the round of 16.
Carmichael's Jenson Brooksby, ranked No. 2 nationally in the 16-and-unders, is seeded second in the men's open draw. He is scheduled to meet ninth-seeded Stevie Gould of Corte Madera in the San Francisco Bay Area today at 8 a.m. in the round of 16.
The men's and women's singles quarterfinals are set for today at 11 a.m., the semifinals for Sunday at 8 a.m. and the finals for Sunday at 11 a.m.