Frank Fontana joined in on a three-on-three drill, talking a little trash and sharing laughs in what was the final practice of the season for the 2015 Manteca High boys tennis team.It gets more serious starting today when the Buffaloes (19-3) head to Ceres to contend for the first-ever Sac-Joaquin Section Division III championship. Then on Thursday, the team’s top two players — Yok Jing Ma and Mike Lopez — will vie for the SJS Division II doubles title at Johnson Racquet Club in Roseville.“Normally we keep it real strict and we’re not messing around,” Lopez said. “It’s usually all business in practice.”That wasn’t always the case in Tuesday’s workout.