I said to me, Okay, you're playing good. "Its better like this than having long matches".
Juan Martin del Potro showed his fighting spirit once again as he battled back from a set down to dump world No. 4 Alexander Zverev out of the Shanghai Masters.
Earlier on Thursday, Grigor Dimitrov booked his place in the quarter-finals, downing Sam Querrey 6-3 7-6 (7-3).
Nadal hadn't won an ATP hard-court title in more than three years until the U.S. Open last month, and now he's gunning for his third in five weeks.
The 20-year-old Zverev, who has collected 5 ATP World Tour titles this season, lost his temper when broken by the Argentine at 2-2 in the decider and flung his racquet down to the ground, reports Xinhua news agency. But 16th seeded Del Potro found his form in the second set, scored 5 love games and levelled the set-score with a 7-5 victory in the tie-break. He repeatedly smashed his racket until it was a mangled mess.
Del Potro, pushed to the brink of retirement by four wrist surgeries that saw his ranking slip as low as 1,045 at one point in his career, said Zverev would learn. "He has everything to be in the top of the game".
Gutsy Del Potro recovered from a set down to win 3-6, 7-6 (5), 6-4 against rising star Zverev and will play Viktor Troicki, after the Serb beat big American John Isner 6-4, 7-6 (4) in the final match of the day.
Fourth-seeded Marin Cilic will face Albert Ramos-Vinolas of Spain.