Korda and Pegula into Australian Open quarter-finals on successful day for US

• Korda aiming to match father by winning title in Melbourne
• Coco Gauff frustrated after loss to Jelena Ostapenko

It was a successful Sunday for the Americans at the Australian Open as Sebastian Korda earned a place in his first grand slam quarter-final, while Jessica Pegula progressed to the last-eight in Melbourne for the third straight year.

Korda earned his place by taking the last three points of the match to edge out No 10 seed Hubert Hurkacz 3-6, 6-3, 6-2, 1-6, 7-6 (10-7).