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.
Bayern Munich coach Thomas Tuchel said on Thursday new striker Harry Kane was already on his way to becoming "an absolute success" story at the club.
Manchester City defender Kyle Walker said he was close to joining Bayern Munich in the last transfer window but has now decided to extend his stay with the treble winners.
Speaking after scoring twice on his home league debut in a 3-1 win over Bavarian derby rivals Augsburg, Kane said he was already building an on-field understanding with his colleagues.
Bayern Munich manager Thomas Tuchel lavished praise on English striker Harry Kane after his Bundesliga debut ended in a 4-0 away win at Werder Bremen on Friday.
Dani Olmo was the star of the show, producing a virtuoso performance and scoring a hat-trick in Munich as Kane's dream of clinching his first major silverware was shattered
Son Heung-min was named Tottenham's new captain on Saturday on the day the club's all-time top goalscorer Harry Kane joined Bayern Munich.
The two clubs have agreed a fee estimated to be worth a Bundesliga record 100 million euros ($110 million, £86 million) for the 30-year-old, who had just one year left on his contract at Tottenham
Tottenham Hotspur striker Harry Kane has not yet completed his move to Bayern Munich but the German champions are working hard to finalise the deal, said Bayern coach Thomas Tuchel on Friday.
Tottenham Hotspur striker Harry Kane has agreed to move to German champions Bayern Munich after the two clubs reached a preliminary deal for his transfer, Germany's Bild newspaper said on Friday.
Bayern, who did not comment on the reports, have been trying to sign the striker for months with any deal worth around an estimated 100 million euros ($110.19 million)