Complex sentence: She held that a woman could not sustain a volleying attack in a long match; therefore, she relied on her baseline game, consisting of strong forehand attacks and a ceaseless defense that wore down her opponents.
Split into simpler sentences: She held that a woman could not sustain a volleying attack in a long match. Therefore, she relied on her baseline game, consisting of strong forehand attacks and a ceaseless defense that wore down her opponents.