Marcus del Rosario enhanced his promising tennis career with a three-title romp in the Palawan Pawnshop’s President’s Cup age group tournament while Erika Manduriao stamped her class in girls’ play at the Olivarez Sports Center in Sucat, Parañaque over the weekend. The third-seeded del Rosario upended top seed Jacob Martin, 6-4, 6-2, in the semifinals then overwhelmed Manuel Balce 3rd, 6-1, 6-3, to cop the boys’ 14-and-under crown. As top seed in the 12-and-under, Del Rosario held off Maverick Legaspi, 6-2, 6-4, to pocket the crown. No. 2 Manduriao, meanwhile, outplayed Karamina Atangan, 6-2, 6-1, to annex the girls’ premier 18-and-U diadem then as the No. 1 seed brought down Princess Catindig, 6-4, 6-1, in the 16-and-U finals.