Alexander Zverev backed up his victory over Rafael Nadal with a win against Dominic Thiem on Saturday to reach another Madrid Open final. The world number six beat the world number four 6-3, 6-4 in the semi-finals. Zverev broke Thiem's serve once in the first set and twice in the second on the Magic Box centre court. The German has yet to drop a set, including against Nadal in Friday quarter-finals. Zverev will play in-form Italian Matteo Berrettini in Sunday's final.