The Australian Open's new balls this year are dividing opinion at Melbourne Park, with even the two greatest men's Grand Slam winners of all-time failing to see eye-to-eye.
Roger Federer, winner of 20 Slams, says the new Japanese-made Dunlop balls behave differently in cooler night conditions and do not allow players to "out-spin" rivals.
But Rafael Nadal, the 17-time major winner renowned for his huge top-spin groundstrokes, countered: "I can't say it's a bad ball." Australian John Millman reckoned... Читать дальше...