The Spaniard showcased his trademark fighting spirit to overcome a tricky test from Francisco Cerundolo, advancing 6-4, 6-3, 3-6, 6-4 after three hours and 36 minutes.
Second seed Rafael Nadal will play Argentina's world number 42 Francisco Cerundolo in the first round while young sensation Carlos Alcaraz will take on Germany's Jan-Lennard Struff.
The defending champion is the top seed after the Russian world number one Daniil Medvedev got banned from taking part while German world number two Alexander Zverev is out due to injury.
Tehran [Iran], June 13 (ANI/Xinhua): Iranian Foreign Ministry Spokesman Saeed Khatibzadeh said on Monday that the recent anti-Iran resolution adopted by the International Atomic Energy Agency (IAEA) was a "political and untechnical" move.
Last week, Medvedev was in action at the Libema Open, where he marched to his second tour-level final on grass at the ATP 250 event. Meanwhile, Medvedev's rise comes after Novak Djokovic failed to defend his crown at the French Open.
Rafael Nadal has climbed to No. 4 spot in the ATP Rankings after he captured a historic 14th French Open title and record-extending 22nd Grand Slam trophy in Paris last week.
French Open men's singles runner-up Casper Ruud said he had no answers when Nadal stepped up his game midway in the second set of the summit clash on Sunday