The strength in depth of men's tennis ensures there are no guarantees on the ATP Tour.
The PIF ATP Rankings offer a tangible way to assess the order of things in the men’s game, yet the 2024 season nonetheless offered plenty of seismic upsets. There were results that rocked top stars, went against the form book and catapulted young players' names into the global spotlight.
As part of our annual in-review series, ATPTour.com counts down the five most unexpected upsets of the year. On Tuesday we'll look at the biggest upsets at the Grand Slams.
[ATP APP] 5) Madrid R2: Monteiro d. Tsitsipas 6-4, 6-4
Not even a Top 10 opponent in red-hot form was enough to stop Thiago Monteiro when he was in full flow at the Mutua Madrid Open.
After coming through qualifying at the ATP Masters 1000 event, Monteiro stunned Stefanos Tsitsipas with a clinical, clean-hitting display. Tsitsipas entered the pair’s maiden Lexus ATP Head2Head meeting with a 10-1 record for the year on clay after winning Monte-Carlo and reaching the final in Barcelona, but the Greek was powerless to deny the inspired Monteiro from notching the fourth Top 10 win of his career.
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