Jannik Sinner has been significantly impacted by an issue John Isner has called out on the ATP Tour.
Sinner won the Monte Carlo Masters at his latest tournament, extending his winning streak to 17 matches.
The Italian has won three Masters 1000 titles during this run of form, with Sinner also completing the Sunshine Double at Indian Wells and the Miami Open.
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Sinner has also won the Paris Masters in his run of four consecutive ATP 1000 titles, but Isner believes he is being short-changed in terms of prize money.
John Isner slams the ATP for prize money at Masters 1000 tournaments
Tennis players have called out the amount of prize money awarded to them at Grand Slam tournaments recently, but Isner has suggested this should concern Masters 1000 tournaments as well.
In the latest edition of the Nothing Major Podcast, Isner revealed that the winner’s prize money at the Miami Open was actually lower this year than when he won the title in 2018.
Isner slammed the ATP Tour for this, calling it an ‘absurd’ issue that no other sport in the world has.
“At The Masters 1000 events, the winner’s cheque has gone down,” said Isner. “When I won Miami in 2018 I won more money for winning the title than Sinner did this year in 2026.
“They have spread the prize money out and there is more total prize money. But the winner’s share was $200,000 less, give or take, in 2026 than it was in 2018. That’s insane, it’s absurd. No sport in the world has that going on right now. It’s ridiculous.”
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How has prize money changed at every Masters 1000 tournament since 2018?
As Isner mentioned, the total prize pot at Masters 1000 tournaments has been increasing in recent years, but that has not been the case for the eventual champions.
The Miami Open has reduced its winners prize money since 2018, as one of five Masters 1000 tournaments to do so.
Indian Wells, the Madrid Open, the Shanghai Masters and the Paris Masters are the other four tournaments that have reduced their champions prize money reduce during this period.
However, Sinner did receive a higher amount of prize money than 2018 champion Rafael Nadal did at the Monte Carlo Masters this year.
| Masters 1000 tournament | 2018 Champion’s Prize Money | 2025/2026 Champion’s Prize Money |
| Indian Wells | $1,340,860 | $1,151,380 |
| Miami Open | $1,340,860 | $1,151,380 |
| Monte Carlo Masters | €935,385 | €974,370 |
| Madrid Open | €1,190,490 | (2025) €985,030 |
| Italian Open | €935,385 | (2025) €963,225 |
| Canadian Open | $1,020,425 | (2025) $1,124,380 |
| Cincinnati Open | $1,020,425 | (2025) $1,124,380 |
| Shanghai Masters | $1,360,560 | (2025) $1,124,380 |
| Paris Masters | €973,480 | (2025) €946,610 |
The next Masters 1000 tournament is the Madrid Open, where Isner will likely have his eyes on whether the prize money has gone up or down this year.
Sinner could be impacted by this again, but he has already hinted that he could skip the Madrid Open after winning the Monte Carlo Masters.
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