The Serbian was trying to come back in the third set, converting his first breakpoint after losing the previous four in the sixth game. But a deadly double-fault in the 11th gave Nadal a chance to serve for the title.
Also on Sunday, helped by four players scoring in double digits, Sichuan defeated Henan 89-62. Enditem
Italy experimented with their starting line-up ahead of the Nations League, as coach Roberto Mancini opted for three Sassuolo players, including Ciccio Caputo, who made his senior Italy debut.
"We improved our ball movement with the match going deep. The players had expected to win this match," said Zhejiang coach Gu Jiaqing.
He also hopes that Tokyo will host the world championships again soon after the Olympic Games.
"We have given away far too many leads," he complains. "We must gain a new mentality."
Henan escaped from an early setback by outscoring Wuhan 28-10 in the second quarter, and never conceded its lead from there on out.
During the match of Group 2 in League C held at Estonia's national stadium A. Le Coq Arena, Estonia's Marten Kuusk scored an own goal only three minutes into the game.
Elsewhere, former Changchun Yatai forward Marinho converted two penalties as Santos upset Gremio 2-1 at home. Diego Souza was on target for the visitors.
Qi Site led Beijing with 18 points. Tang Yu recorded a double-double of 15 points and 11 boards. Shi Xiufeng and Qi Yu bagged 14 and 13 respectively.
The Real Madrid star, who wore the captain's armband under the rotating leadership policy of manager Tite, said the team needed more time to gel following several changes to the starting eleven.