oh that's just so clever and even Madison Keys applauds that one but it's not like she gets a good read on it that often got it well played first Ser percentage pretty low right now for Mertens just 35% in this set we are going [Applause] three it's a great l oh that whole thing that whole [Applause] thing come on that's bison Keys figures out a way to win that point that's it and they say Martens has just knocked out the 14th seed Madison Keys ladiesent she has such knowledge of the court and of her opponent