Alexander Zverev made some harsh comments about the balls used at the Rio Open just before suffering a shock loss. On Friday, the top seed saw his campaign end in the quarterfinal after world No. 86 Francisco Comesana completed an upset 4-6 6-3 6-4 win.

Argentina's world number 86, Francisco Comesana delivered a stunning performance at the Rio Open on Friday. He defeated the Australian Open finalist and world number two Alexander Zverev 4-6, 6-3, 6-4 in the quarter-finals. This win is a major milestone in Comesana's career as it is his first-ever victory over a top-five opponent.

Friday's win in Rio de Janeiro is the 24-year-old Francisco Comesana's first victory over a top-five ranked opponent.

BREAKING: Trump abruptly fires Joint Chiefs Chairman, other top Pentagon leaders US military releases first photo from orbit from its mysterious space plane After Vladimir Guerrero Jr Loss, Blue Jays Urged to Course Correct By Extending Their 2x All-Star's Deal New TSA Rules: How to Pack Medications for Travel in 2025!

The quarterfinals at the ATP Rio Open are set, and some unexpected names have emerged. This has not been a good week for the seeded players, but the top seed, Alexander Zverev and defending champion,