Bayern Munich manager Carlo Ancelotti stressed the importance of rotating players ahead of their match against Hamburg.
Bremen signed Gnabry, 21, for a reported fee of £5 million last month, with the German's contract with Arsenal due to expire next summer.
Bayern Munich winger Arjen Robben will have to wait for his first start in over six months when the German champions travel to Hamburg on Saturday.
The key stats ahead of the weekend's Bundesliga action, including Dortmund's incredible scoring run.
The case on trial was an incident at a second-tier match between Cologne and Paderborn in February 2014, in which a supporter threw a firework.