Chang Yani and Chen Yiwen were in a league of their own en route to gold as China dominated the women’s Olympic 3 metres springboard synchronised diving for the sixth time in a row on Saturday. Triple world champions Chang and Chen amassed 337.68 points in their Olympic debut, with the only very minor hiccup coming in the fourth and penultimate jump when they entered the water not quite at the same distance from the board after 3 1/2 summersaults. America pair Sarah Bacon and Kassidy Cook took silver with 314.64 and bronze, like at the recent world championships, went to Britons Yasmin Harper …