Coco Gauff tries to be positive after chastening US Open defeat to Naomi Osaka

Coco Gauff struggled against Naomi Osaka. pIC: Kirsty Wigglesworth/AP

Coco Gauff believes better times lie ahead despite a chastening loss to a resurgent Naomi Osaka in the fourth round of the US Open.

This was the most anticipated match of the tournament so far but it lasted only 64 minutes, with Osaka racing to a 6-3 6-2 victory for her biggest grand slam result in more than four years.