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 star Robert Lewandowski revealed Tuesday he wants to call time on his career with the Bundesliga giants because of his desire for "more emotions in life".
Robert Lewandowski said Monday that his time with Bayern Munich was over, without specifying his future plans, amid reports that Barcelona have made him an offer.
Robert Lewandowski scored a hat-trick to help champions Bayern Munich cruise to a 3-0 victory at Schalke 04 on Saturday for their first win in the Bundesliga this season.
English winger Jadon Sancho starred for Borussia Dortmund on Saturday to help his side beat rivals Bayern Munich 2-0 to win their sixth DFL Super Cup and claim early bragging rights in the curtain raiser for the German Bundesliga.
Champions Bayern Munich beat RB Leipzig 3-0 on Saturday thanks to two goals from Robert Lewandowski to win their 19th German Cup and complete a domestic league and Cup double.
Bayern Munich president Uli Hoeness is happy Mesut Ozil has retired from international duty with Germany, claiming the Arsenal midfielder has been "s*** for years".
Franck Ribery issues a battle cry before Tuesday's Champions League semi-final second leg at Real Madrid where Bayern Munich know they must be ruthless in front of goal to stage an unlikely comeback.
Holders Real Madrid come from a goal down to snatch a precious 2-1 victory at wasteful Bayern Munich on Wednesday in their Champions League semifinal first leg.
A goalless draw against Sevilla on Wednesday was enough to send Bayern Munich into the Champions League last four with a 2-1 aggregate victory.
New Borussia Dortmund coach Peter Stoeger has his sights set on glory as his team prepares for a heavyweight round of 16 German Cup tie with Bayern Munich.