However, the wheels came off on Sunday as they crashed to a 6-1 defeat away to Atletico Madrid, who tore Granada's usually solid defense apart time after time.
Local hero Daniil Kvyat gave the Russian fans in attendance something to cheer with eighth place ahead of AlphaTauri teammate Pierre Gasly, while a difficult race for Alex Albon saw the Red Bull driver finish tenth.
The recent failure is nursing doubts about the club's strategy to gain sufficient success by signing talents using Dortmund as an intermediate station on their way to one of the continent's leading sides.
All eyes were on Messi after a summer in which he had asked to leave the club and only two days after he had criticized the departure of Luis Suarez, but Fati was the star of the show.
The win saw PSG move up to the seventh place on the standings, only four points behind leader Rennes, while Reims still sits second from bottom after suffering four defeats in a row.
Sevilla came back from a goal down to get their season underway with a 3-1 win away to Cadiz.
Valencia were held 1-1 at home to recently promoted Huesca in a game the visiting side probably deserved to win, but had to settle for Dimitrio Siovas' header cancelling out Daniel Wass' fortunate opener for the home side.
The two sides were locked in a stalemate at the beginning of the third set but after reaching a tie of five, Shanghai scored six in a row and finally won the third 25-19 to reach the semifinals.
The Spaniard will next take on 18th seed Grigor Dimitrov of Bulgaria, who beat Slovakia's world number 102 Andrej Martin 6-4, 7-6, 6-1.
Mexico will meet the Netherlands in Amsterdam on October 7 and Algeria in the Hague six days later.
GWM earlier told the Thai media that it aims to make Thailand its ASEAN (the Association of Southeast Asian Nations) production base for domestic sales and export of new energy vehicles and internal-combustion engine models.