_________ won the Madrid Open title in Men’s Singles ?

a) Rafael Nadal
b) Dominic Theim
c) Matteo Berrettini
d) Alexander Zverev 

The German Tennis player and the world number six Alexander Zverev continued his sensational form and won his 2nd Madrid Open Title on May 10, 2021. He also lifted his fourth ATP Masters 1000 trophy. He had beaten Rafael Nadal in the quarterfinals and fourth-ranked Dominic Theim in the semifinals. He defeated world number 10 Matteo Berrettini from Italy by 6-7 (8), 6-4, 6-3 in the finals.