Jan 26 (Reuters) - Ben Shelton has ‌lost to Jannik Sinner in their last eight meetings, but the American ‌eighth seed believes his game has improved enough to give him ‌a chance to upset the Australian Open defending champion in Wednesday's quarter-final clash.

Shelton beat Norwegian 12th seed Casper Ruud in the fourth round on Monday to set up his first match with Sinner since ‍a straight-sets loss to the Italian second seed ‍at the ATP Finals in November.