Email By Simon Smale Updated September 08, 2019 13:20:01 Photo: How many more chances will Serena Williams get to beat Margaret Court’s record? (AP: Adam Hunger) Related Story: Canadian teen beats six-time US Open champion Serena Williams, claiming her first title Related Story: ‘You’re a thief’: Controversy reigns as Osaka beats Williams in US Open final Related Story: Can having a baby actually improve athletic performance in the long run? Map: United States It has become one of the most drawn-out subplots in tennis history.Will Serena Williams ever claim her 24th grand slam title? Can she ever claim another grand slam title? That she has been to four major finals out of a possible seven since returning to the sport after giving birth in 2017 suggests she can.That she has buckled under the enormous weight of self-imposed and external expectation in all four suggests otherwise.There was a clear sense of that pressure in Williams’s straight-sets defeat at the hands of unheralded Canadian teenager Bianca Andreescu at a packed Arthur Ashe Stadium in the US Open final.The traditionally-parochial New York crowd were on tenterhooks, expecting to see their hero break her recent major drought and propel herself to the top of…