platform tennis
... that the standard size of a platform tennis court was influenced by the presence of a rock and a steep hill in the backyard of the sport's co-inventor?
... that the standard size of a <b id="mwC2I"><a href="./Platform_tennis" id="mwC2M" rel="mw:WikiLink" title="Platform tennis">platform tennis</a></b> court was influenced by the presence of a rock and a steep hill in the backyard of the sport's co-inventor?