PSG have been in fine form so far this term, while Bayern are yet to fully convince, as the two sides prepare to go head-to-head in Paris next week.
"[Schalke coach] Domenico Tedesco is doing a very good job, they had a good start," Ancelotti told a pre-match news conference. "They are well organised in attack and defence.
"It will be hard [on Tuesday], more difficult than last year. We focus on Schalke because they have nine points - not on Paris.
"After that comes the game against Wolfsburg, then we have five days to prepare for Paris."
"It's normal - we had not played so well," he added. "But it is also true that we have won six of seven games. We need to create a balance."
Ancelotti confirmed that James Rodriguez is not fully fit, but he will be available against Schalke.
"He's not 100 per cent, but he's available," the coach said. "His form is better. He can play between the lines of the opponent, everywhere."
The Colombia international could start alongside Thomas Muller, while Arjen Robben will miss out with the flu.