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.
Real Madrid forward Vinicius Junior scored a double, including an 83rd-minute equalising penalty, to snatch a 2-2 draw at Bayern Munich in Tuesday's Champions League semifinal first leg.
Real Madrid are on a mission to clinch their 15th UEFA Champions League title but face Bayern Munich in a high-voltage clash in the semifinals of the competition. Can Bayern stop Real in their tracks? Real, on the other hand, only have the mighty German in their way and if they make it to the finals, the odds weigh heavily in their favour because Los Blancos have a reputation for not losing finals. The last time they lost a final in Europe was 43 years ago. Since then, they've won all of the eight finales they've played in.
The Munich clash also pits two England superstars against each other.
Harry Kane has his eyes set on Robert Lewandowski's record for most Bundesliga goals in a season after scoring twice in a 2-1 victory over Eintracht Frankfurt, but the England striker acknowledges he needs "to get a move on".
The Bavarians, who saw Bayer Leverkusen end their 11-year-Bundesliga reign by securing the league crown two weeks ago, have only the Champions League trophy to fight for with departing coach Thomas Tuchel eager to leave on a high note.
Honorary Bayern Munich president Uli Hoeness said it would be "a catastrophe" for Julian Nagelsmann if Germany are not successful at Euro 2024 after turning down the chance to return to his club.
Bayern Munich coach Thomas Tuchel said forward Serge Gnabry "will play and will score" in Tuesday's Champions League semi-final first leg at home to Real Madrid, but Leroy Sane's status for the match is in doubt.
The former Manchester United boss said "there has been contact" between himself and Bayern but would not be drawn on whether he would take the offer.
Bayern Munich are to honour the late German football legend Franz Beckenbauer with a statue outside their Allianz Arena home ground, a club supporters foundation announced on Sunday.
Julian Nagelsmann has signed a contract extension with the German men's national team, the domestic football association said Friday, putting to bed speculation of a quick return to club football.