Imposing superhero playing tennis. He is ready to hit the ball. Stable pose. Full body portrait. Stoic and determined. White clothes, shield emblem. Low camera angle. Dramatic light. Crowded stadium. --ar 3:4 --sref <https://s.mj.run/ftRdRdbVRms> <https://s.mj.run/RkoqCSWfKi4>