Although Messi will remain at the Camp Nou until he can leave as a free agent, fans are worried at the interview in which he explained how he felt in recent months.
The victory also moved the Azzurri to top spot in Group A1 with four points from two games, one point clear of the Dutch, who are playing under interim coach Dwight Lodeweges following Ronald Koeman's departure for Barcelona, and third-placed Poland, who came from one goal behind to beat Bosnia and Herzegovina 2-1 in Monday's another action.
The clay-court Grand Slam, which was originally due to be held in May, will be staged from September 27 to October 11.
In the second half, Shanghai launched aggressive attack to pull one back, but their efforts turned out to be fruitless.
Shanghai-based Oriental Sports Daily doubted the Brazilian player had time to go through any kind of medical quarantine.
There were shock wins for local players Jennifer Brady and Shelby Rogers. Brady stunned Germany's Angelique Kerber 6-1, 6-4, while Rogers upset Petra Kvitova from the Czech Republic 7-6 (5), 3-6, 7-6 (6). Kazakhstan's Yulia Putintseva also registered an upset as she overcame eighth seed Petra Martic of Croatia 6-3, 2-6, 6-4. Enditem
Going into the final round with a one stroke lead, Yin made a birdie four at the 534-yard second to get to eight-under. She could then only muster par for the next nine holes before making birdie at the 12th hole as playing partner Zhang Yunjie picked up four birdies to get to 10-under for a one stroke lead through 15 holes.
The women's long jump event saw teenager Qin Huiling better her PB by three times to land the victory at 6.37m. Zeng Rui also renewed her life-time best to win the women's triple jump title at 14.10m, while Fang Yaoqing won the men's triple jump at 16.88m. Enditem
The organizers designed a route with a 17km climb before the finish line, which seemed like it might bring about some interesting developments on the rugged, narrow mountain road.
Though it was clear that Djokovic had not intended to hit the line judge, organizers nevertheless said the Serbian was disqualified in accordance with the rules.
The 24-year-old Chelsea striker scored his 12th goal for Germany while Gnabry crossed the Champions League finish line with nine goals and three assists in ten games.