Dunlop recently usurped Head’s ATP Tour ball as the officially branded orb of the men’s championship tour. The stark contrast between the two balls reflects the style of professional game the ATP wants to encourage. This ball plays fast, refuses to fluff up and is designed to be blasted for a winner time and time again. Jessica Pegula, the US No 1, believes they yield more errors: “I feel like the first couple weeks there are a lot of double faults, because the balls are just kind of flying a bit more,” she said.

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With the spotlight on this disparity, there may well be a change at future US Opens, with the grand slam’s organisers, the United States Tennis Association (USTA), stating it “works closely” with the WTA and ATP Tours and their respective player councils “to determine what type of balls they recommend playing with for the coming US Open”.

That has taken tennis legend Martina Navratilova by surprise, as she told Sky Sports that the heavier ball used by the male players may give female players some physical challenges.Slazenger has a constant engagement in developing their product. Their expertise is driven by sports scientists from Loughborough University. The Wimbledon balls use an exclusive Ultra Vis dye, which enables optimum visibility for players and spectators. The USTA have decided to use the same tennis ball for the men’s and women’s event at the US Open for the first time and we have been given the inside story on how the ball has been developed by manufacturers Wilson. My coach has not been as discreet as other coaches, but it has been always happening," Tsitsipas said.

I’m sure it’s going to be different based off how people hit the ball, people’s strokes,” the American said. I think people underestimate how mental and strategic the sport is, so they don't understand how big of a difference it is. Costco Online UK Limited, UK Home Office, Hartspring Lane, Watford, Hertfordshire, WD25 8JS. Registered in England and Wales No. 8055444The Wilson US Open ball are engineered with a premium Tex/Tech industries felt designed to deliver optimal performance, comfort and durability for extended periods. The rubber compound used for the core enables its best performance even at 3000 feet above sea level. Of the balls that we sell at a lower price-point, such as the Championship (or champ) line of balls, you will typically find one of two things that varies from the premium balls. There are more nylon fibers in the felt and/or the construction is done by “needle-punch” instead of the woven application used on the premium balls. I often find a new tube of Wilson US Open balls can last two matches at a time on a hard court before really starting to play any differently. If you play on carpet or artificial turf, they’d probably last even longer depending on how hard you slap them around. That durability is great to see from a top-tier brand, and even after their match quality is done, I find I can get a good couple of training sessions in with them before I need to retire them completely.