World No. 118 Thiago Monteiro swept Stefanos Tsitsipas 6-4, 6-4 to roll into the Mutua Madrid Open third round for the first time.
Collins rallied from a set down to reach the third round in Madrid.
Two-time champion Carlos Alcaraz disarmed Alexander Shevchenko 6-2, 6-1 in a rousing return to the Mutua Madrid Open..
Nadal sets a clash with Aussie Alex de Minaur in the second round at Madrid.
Coco Gauff required just 51 minutes to dish out a double-bagel to Arantxa Rus after Liudmila Samsonova stopped Naomi Osaka 6-2, 4-6, 7-5.
Osaka sets a round 2 clash with Liudmila Samsonova in Madrid.
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