Naomi Osaka grinds it out to see off Siniakova’s stubborn US Open challenge

<ul><li><p>Former champion into third round with 6-2, 5-7, 6-1 win</p></li><li><p>‘I hope to continue making good memories here’</p></li></ul><p>For a second consecutive match at the US Open, Naomi Osaka appeared to be cruising. Every