Complex sentence: However, Copado would never play in Spain's top level, as he left in July 1997 and joined lower league outfit Tennis Borussia Berlin--there, he played under Hermann Gerland, the manager mostly associated with the player's explosion.
Split into simpler sentences: However, Copado would never play in Spain's top level, as he left in July 1997, joining lower league Tennis Borussia Berlin. There, he played under Hermann Gerland, the manager mostly associated with the player's explosion.