US Open Roundup | Rafael Nadal gets off to a flyer while Naomi Osaka stuns Angelique Kerber

After that initial scare, however, Nadal dominated the rest of the match as he went onto clinch a straight set victory. Though Lajovic had managed an incredible 83% first serve rate in the opening set while also producing nine winners, he could not maintain the same level of tennis over the next two sets which eventually cost him. Nadal will face Japan's Taro Daniel or American Tommy Paul next.

No other men's matches were completed on day two because of the rain which arrived after less than two hours' play and forced the cancellation of the schedule on the outside courts.

In the 65 minute encounter against Kerber, Osaka played a brilliant brand of power tennis as she conjured up 22 winners enroute to booking a place in the second round. Kerber’s exit was also notable as no US Open defending champion had lost in the first round the following year since Svetlana Kuznetsova in 2005, but the German could not get going against Osaka on the day.