Alexander Zverev opened his 2019 season at the Hopman Cup, playing with Angelique Kerber. They once again reached the final and lost to Switzerland. At the Australian Open, he lost to Milos Raonic in straight sets in the fourth round. He then played in the Davis Cup qualifiers, winning both of his singles matches as Germany defeated Hungary. Zverev next played at the Mexican Open and finished runner-up to Kyrgios. He then failed to win back-to-back matches in his next six events losing in the third round of the Indian Wells Masters to Struff, the second round of the Miami Open to David Ferrer, the second round of the Grand Prix Hassan II to Jaume Munar, the third round of the Monte-Carlo Masters to Fognini, the second round of the Barcelona Open to Jarry and the quarterfinals of the BMW Open to Cristian Garín. He broke his slump by advancing to the quarterfinals of the Madrid Open, where he lost to Tsitsipas. At the Italian Open, Zverev lost to Matteo Berrettini in the second round. Zverev won his first 2019 title at the Geneva Open, defeating Nicolás Jarry in the final after saving two match points. He reached his second consecutive quarterfinal at the French Open, where he lost to Novak Djokovic in straight sets.