Ranked No. 182, the 20-year-old Rafa Nadal Academy alum scored a second-round stunner over No. 13 seed Ben Shelton.

“I’m not just here to beat Andrey,” said Comesana, who upset Rublev—and then backed it up with a five-set triumph.

Entering Tuesday's contest, the Argentine had lost in the first round of Eastbourne qualifying to 245th-ranked Broom.