Fresh from a two-title romp in last week’s Bagong Pilipinas Juniors tennis tournament, Miguel Lagac III hopes to sustain his winning momentum as he headlines a stacked field in the San Pablo Juniors Age Group Championships at the 7 Lakes courts in San Pablo City, Laguna.The Group 2 tournament, sanctioned by Philta and Universal Tennis Ranking, got under way Thursday (May 7), featuring competitions in four boys’ age-group categories. The girls’ s…