Updated: May 20, 2021
Arthur Cazaux d Adrian Mannarino 6-3 6-7(5) 6-3
Next Gen vs Old Gen. As we saw 18yo Cazaux come up against 32yo Mannarino. With Cazaux taking the first set convincingly, it was hard to see a comeback, but after a close second set tiebreak won by Mannarino, there was a glimmer of hope. Cazaux took an injury timeout up 4-3 on serve. Some may say this was to calm himself down, but it must've helped him as he won the next game to love, and closed the match out on his serve. He takes the winner of Pablo Cuevas or Reilly Opelka in the second round.
Dominic Koepfer d Benoit Paire 6-7(8) 7-6(5) 6-4
In just over 2h30m, Koepfer finally scraped the win. In what was a very tight affair, it was the German victorious in the first round. His form hasn't been great as of late, despite having better clay seasons, but a win none the less.
Pablo Andujar d Jordan Thompson 6-0 6-4
It was hard to see Andujar losing this. The Spaniard is impeccable on clay, but maybe just a bit old. He was fresh after not playing for 2 weeks. Thompson is just not a natural clay-courter, as was visible from watching the match. His movement is like he's on hard court and hitting style is not up to scratch for clay.
Tennys Sandgren d Salvatore Caruso 6-3 6-4
A big part in why the American beat the Italian on clay is his huge first serve. Sandgren hit won 81% of his points on first serve compared to only 67% for the Italian. With only being broken once, and breaking serve three times, it was a clean victory.