PSG visited Bayern's Allianz Arena on Tuesday and a section of the home support unveiled a banner with a profanity aimed at the "plutocratic Al-Khelaifi".
"We concede a lot of goals because we are not stable," complained Guardiola.
Bayern Munich striker Harry Kane hit back at criticism levelled at him, saying he would do his "talking on the pitch" after becoming the fastest to 50 goals in Bundesliga history on Friday.
The German giants, who went without a trophy last year for the first time since 2012, are primed for a return to the winner's circle.
Struggling in Europe after back-to-back losses left them outside the knockout places, Musiala broke through the stubborn Benfica defence, heading in a Harry Kane assist.
Bayern Munich will learn from their 4-1 Champions League defeat to Barcelona but the German team's belief in a successful season is intact, coach Vincent Kompany said on Saturday ahead of Sunday's league game against VfL Bochum.
Bayern Munich coach Vincent Kompany and his Bayer Leverkusen counterpart Xabi Alonso on Friday joined the growing chorus calling for action on player workload, amid talks of strikes.
A street next to Bayern Munich's Allianz Arena stadium will be renamed to honour German football great Franz Beckenbauer who died earlier this year, the city council announced Thursday.
"Something big is coming," Neuer told reporters ahead of Tuesday's opening clash with Dinamo Zagreb at home.
Cristiano Ronaldo faces an uncertain future after the Manchester United striker's attempt to force his way out of Old Trafford failed to spark the expected rush for his signature.
New signings Sadio Mane and Matthijs De Ligt scored debut goals as Bayern Munich thumped Major League Soccer's D.C United 6-2 in a friendly on Wednesday.
Bayern Munich coach Julian Nagelsmann said it is "crazy" that Barcelona have been able to make multiple signings in the transfer window, including Robert Lewandowski from the Bundesliga champions.
Bayern Munich defender Alphonso Davies feared he might not play again after doctors were unable to give him a timeline for his return when he was sidelined by a heart problem last season.
Bayern Munich have signed Dutch defender Matthijs de Ligt from Juventus on a deal until 2027, the German Bundesliga champions said on Tuesday.
Robert Lewandowski will bring the 'winning mentality' Barcelona need according to new team-mate Andreas Christensen.
Bayern Munich have agreed a fee of 70 million euros to sign Dutch central defender Matthijs de Ligt from Juventus, according to reports in German media.
Bayern Munich said on Saturday they had extended the contract of Germany winger Serge Gnabry until 2026, the news closely following the announcement of a deal to sell Robert Lewandowski to Barcelona.
Poland striker Robert Lewandowski is set to join Barcelona after Bayern Munich reached a verbal agreement with the LaLiga side on a transfer, the Bundesliga champions said on Saturday.
With the acquisition of Robert Lewandowski all but done, Barcelona are set to be back in the La Liga title race in 2022-23 -- providing that they can register their new signing. Back in May, Lewandowski said, "My era at Bayern is over. I don't see any possibility to continue playing for this club anymore." While he did return to preseason training for the German side, there was an expectation that Barcelona would eventually find a way to hit their asking price and they did just that.