Complex sentence: He pushed his oldest daughter Whitney to start training to be a professional tennis champion from an early age so he could live vicariously through her life; he is not shown to pay too much attention to his youngest daughter Simone.
Split into simpler sentences: He pushed his oldest daughter Whitney to start training to be a professional tennis champion from an early age so he could live vicariously through her life. He is not shown to pay too much attention to his youngest daughter Simone.