Dortmund responded with furious attacks but Gikiewicz was alert enough to keep out promising chances from Thomas Meunier and Erling Haaland before the break.
Qin Haiyang from Shanghai, who finished second in the preliminary final of the 400m event, missed the final, after he failed to make the top eight in a selection of physical tests, according to a new requirement of the championships.
Although the club offered no further explanation, merely stating the injury was "pending evolution," it means that Hazard (who didn't play in Madrid's first two matches of the new season) drops out of the squad to face Valladolid in the Alfredo Di Stefano this Wednesday night and makes him a major doubt for the weekend's away trip to play Levante.
In the Uruguayan capital Montevideo, Penarol kept alive their hopes of progressing to the next stage, with a 3-0 win over Chile's visiting Colo-Colo.
Monchengladbach sporting director Max Eberl called his club's group exciting "as we face Europe's top dogs." Leipzig coach Julian Nagelsmann might face the biggest challenge to repeat his side's semifinal performance last season, with key figures Timo Werner and Patrik Schick having left the club. Enditem
Maccabi increased the gap to 75-60 with seven minutes to go, securing the club's first Euroleague win of the season.
With the victory over Ymer, Djokovic improved his record this season to a stellar 32-1. The only defeat came in a disqualification earlier this month at the US Open, where he hit a ball in frustration which struck the line judge on the neck.
Pliskova wasted eight set points in the opener but recovered quickly in the following two sets, serving out the contest on Court Philippe-Chatrier after two hours and 15 minutes.
The top four of each group will play the second phase between October 16-December 12 in Suzhou.
"We are a bit weak in the question of central defenders: with Gerard (Pique) and (Clement) Lenglet and (Ronald) Araujo, we are a bit short ... it is weak for the season that we are going to play," he admitted.
"We are continuing to see benefits from the forthcoming changes to the format of the World Championships Finals, which will be introduced from next year onwards, leading to more countries bidding from different regions of the world," said ITTF Deputy President Khalil Al-Mohannadi.