Images and videos of the event have been circulating widely on social media overnight, with many viewers quick to point out that the exact same set of events took place this time last year, when rain at the Rio Open saw one of Alcaraz's matches suspended, leading him to offer the ball kids shelter then too.
Alcaraz went on to win the title last year, kicking off a lethal run of form that ultimately resulted in become World No. 1. So the rain delay - while frustrating - may be viewed as a good omen for the young Spaniard.
Alcaraz eventually won the match, taking him into the second round where he will face Fabio Fognini of Italy.