But the broader question concerns how Pep Guardiola's men will bounce back from their shock 2-1 home defeat to Lyon in their Group F opener.
After losing the opener to Lyon, it looked like City would just get a point from this match, but the Spanish global would deliver the most important goal for the team in this young season.
"It's a good three points as we fought against a lot of things so we're satisfied", Guardiola said.
Sunday's fixture will also be each side's last chance to stake their claim for top spot before heading into the global break.
Raheem Sterling, after a lightning end-to-end break, and Aguero, who was a livewire all evening, went close to putting City ahead as they piled on the pressure.
City defender Kyle Walker was fortunate to escape with just a yellow card for a bad challenge on Pavel Kaderabek in the second half, while the visitors thought they should have had a penalty when Baumann appeared to bring down Sane after missing the ball.
"He's coming out in press conferences constantly having a go at players, having at go at people above him because he's not getting what he wants", said Scholes.
According to the Euro Club Index, Manchester City's chances of progressing to the Champions League knockout phase dropped from over 90% to 72% after their home defeat by Olympique Lyon.
But City finally got the victor after Stefan Posch was caught dallying inside the area, allowing Silva to find the bottom-right corner with typical assuredness.