Second seed Nadal will face Italy's Stefano Travaglia in the round of 32. The latter survived a five-set thriller against Japan's Nishikori Kei to advance 6-4, 2-6, 7-6 (7), 4-6, 6-2.
Koeman changed the style Barca used under Quique Setien, adapting a 4-2-3-1, with Antoine Griezmann leading the line, Frenkie de Jong and Sergio Busquets in the midfield holding roles and Messi, Philippe Coutinho and Ansu Fati in an attacking line of three.
Atalanta claimed a one-sided win against Lazio, as Papu Gomez took the stage with a brace, helping the Dea enjoy a 4-1 victory.
Elsewhere, Borussia Monchengladbach are still waiting for their first win of the season as they shared the spoils with Union Berlin following a 1-1 draw.
"I think it's a great variety shot, the dropshot. I think it's important tactically to have it and to use it at the right time so that you can keep your opponent always guessing what the next shot is," said the top seed, who is seeking his 18th Grand Slam title at Paris.
BUENOS AIRES, Sept. 30 (Xinhua) -- Six-time champions Boca Juniors secured their place in the Copa Libertadores knockout stage on Tuesday, despite being held to a goalless home draw by Libertad.
The runners-up, a joint team from Liaoning and Sichuan, finished in 3:53.12, and Guangdong took the third place in 3:53.39. Enditem
Valencia were held 1-1 at home to newly-promoted Huesca in a game the visiting side probably deserved to win.
Comments of team leaders indicate growing unrest in a squad that seems to fear their ambitions could be disappointed when trying to repeat some of last season's success after winning the treble.
"As Sports Director, I am very honored and humbled to be able to support the Olympic and Paralympic Games from a sporting perspective and the perspective of an Olympian," Kotani said.
In the Meizhou division, Meizhou Hakka continued to lead the rankings by beating Shaanxi Chang'an Athletic 2-0, while Guizhou Hengfeng edged Jiangxi Liansheng 3-1, and Zhejiang Energy Greentown down Liaoning Shenyang Urban 1-0.