Scottish tennis star Andy Murray launched a fresh rocket at his US Open conqueror Stefanos Tsitsipas on Tuesday, griping that the Greek player took longer on bathroom breaks than it took billionaire Jeff Bezos to reach outer space.The Briton was furious when Tsitsipas took a break that ran close to eight minutes during their five-set first-round clash on Monday, which he felt disrupted his game and swayed the outcome.The 2012 Flushing Meadows champion was still stewing a day later.“Fact of the…