US Open: Rafael Nadal sensing his best tennis after quarter-final win

Rafael Nadal, who demolished Andrey Rublev 6-1, 6-2, 6-2 to reach his sixth US Open semi-final, feels he's in a 'good round' ahead of his clash against the 24th seed Juan Martin del Potro. World No. 1 Nadal broke Rublev's serve seven times, won total 92 points to Rublev's 53. Meanwhile, Roger Federer's defeat to del Potro means Nadal will retain the World No. 1 ranking next week. (Video Credit: SNTV)