If any of the four Slams could throw up a different winner, then recent history suggests it could happen at the US Open.

The slightly slower hard courts, humid conditions and its slot as the final major in a busy season have been contributing factors to six different champions in the past seven years.

Novak Djokovic is the only man to win it twice during that period. Even though he is now 38, the Serb remains the leading contender to stop defending champion Sinner and 2022 winner Alcaraz.

German third seed Alexander Zverev has not yet won a Grand Slam title despite his his pedigree, appearing to lack belief against the very best at the business end of majors.

In a bid to get over the line, the three-time major finalist recently enlisted the help of Toni Nadal – who coached his nephew Rafael to 16 of his 22 Grand Slam titles.

The trip to Nadal’s academy in Majorca came after Zverev’s first-round exit at Wimbledon, where he opened up about receiving psychological help to get “out of the hole” he was in.

“Of course to beat Alcaraz and Sinner is not easy but he has more chances to beat these two guys more than most others,” Nadal told BBC Sport.

“This is what I explained to him.