Getty Major scoring change coming for Grand Slam matches? As US Open quarterfinal action continues from Flushing Meadows, it sounds like a pretty significant scoring change could be in store for all four Grand Slams. On Tuesday, renowned reporter Jon Wertheim explained on Tennis Channel Live that because of a dispute between the technology company behind automated let calls and Grand Slam tournament directors, chair umpires have manually made let calls at the US Open, and several other Slams