Mayo brothers reach round of 16 in Jr. Orange Bowl

   Keenan Mayo had it tougher than his younger brother, Aidan, on Friday.
   But both residents of Roseville, a suburb of Sacramento, reached the round of 16 in the Junior Orange Bowl in Coral Gables, Fla.
   Keenan Mayo, seeded third in the boys 14s, turned back 17th-seeded Jake Hersey of Great Britain 7-6 (6), 7-6 (0).
   The 6-foot-2 (1.88-meter) Mayo won the USTA National Clay Court Championships in Fort Lauderdale, Fla., in July. He is ranked first in the United States.
   Aidan Mayo, seeded ninth in the 12s, beat unseeded Faris Khan of San Antonio 6-1, 2-1, retired (back). They are ranked third and fourth, respectively, in the United States.
   Keenan Mayo will take on 17th-seeded Daniel Michalski of Poland for a quarterfinal berth. Michalski surprised ninth-seeded Joao Silva of Brazil 6-3, 6-4.
   Aidan Mayo will face unseeded Juan Zabala Vargas of Ecuador. Zabala Vargas dismantled unseeded Tony Huang of China 6-2, 6-1.
   The Mayos train at the USTA center in Carson in the Los Angeles area.