Ben Shelton's big summer hit a wall in Cincinnati this week, as unseeded Portuguese qualifier Jaime Faria pulled off the upset of the ATP Masters 1000 tournament so far, beating the American 6-4, 6-4 to snap his six-match winning streak.

Shelton arrived in Ohio fresh off winning the Canadian Open in Montreal — a Masters 1000 title that had vaulted him into the conversation as the hottest player on tour — but looked flat from the opening game, according to the ATP Tour. Faria broke early in the first set and never let go, then survived a scare in the second when Shelton surged to a 4-1 lead before the 21-year-old ripped off five straight games to close out the biggest win of his career.

THE VICTORY MARKS FARIA'S FIRST-EVER WIN OVER A TOP-10 OPPONENT.

A Career Milestone Amid the Rain

The match, delayed by rain that pushed much of the weekend's order of play into Monday, was Faria's first career win over a top-10 ranked player and one of the signature results of his young career, Deadspin reported. Faria qualified for the main draw and had never before advanced past the second round of a Masters 1000 event.

For Shelton, the loss is a jarring comedown after arguably the best stretch of his career — the American had been ranked as high as world No. 5 this season and entered Cincinnati hoping to string together back-to-back Masters titles for the first time. Instead, he exits early from the last major hard-court tune-up before the US Open, which begins in New York later this month.

Cincinnati's draw produced other early fireworks: Argentine Mariano Navone stunned world No. 1 Novak Djokovic, while second seed Felix Auger-Aliassime, fourth seed Daniil Medvedev and rising Brazilian teenager Joao Fonseca all advanced to keep their own title runs alive. Alexander Zverev also moved through his opening match as the tournament's contenders began separating from the field.

Faria now moves into the third round — a stage he has never before reached at this level — against a considerably higher-profile draw than the one that got him there. Win or lose from here, tournament organizers and ATP officials say the run has already been one of the breakout storylines of the North American hard-court swing, the last tune-up before players shift focus to Flushing Meadows.