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.
Franck Ribery came off the bench to seal Bayern Munich's 3-0 win at Cologne on Saturday, extending their Bundesliga lead to seven points.
Bayern Munich forward Robert Lewandowski scored a hat-trick as the Bundesliga leaders mercilessly obliterated Hamburg SV 8-0 on Saturday as coach Carlo Ancelotti celebrated his 1,000th game as manager.
Bayern Munich coach Carlo Ancelotti has been asked to explain how he lost his calm and stuck a finger up at a group of Hertha Berlin fans at the weekend.
Mesut Ozil's agent has come out in defence of the Arsenal midfielder, saying the player's languid body language is often mistaken for a perceived lack of effort and disputing claims that the German does not perform in big games.
Former players were brutal in their criticism of manager Arsene Wenger following Arsenal's latest Champions League humiliation.
Bayern Munich coach Carlo Ancelotti has backed under-fire Arsene Wenger to lead Arsenal out of their slump, despite their "sensational" 5-1 Champions League thrashing in Germany.
Arsenal manager Arsene Wenger was not looking for excuses after his team were demolished 5-1 by Bayern Munich in their Champions League round of 16 first-leg game on Wednesday.
Bayern Munich routed Arsenal 5-1 in their Champions League last 16 first leg clash on Wednesday thanks to a blistering spell of three goals in 10 second-half minutes.
Bayern Munich's Philipp Lahm, who captained Germany to their 2014 World Cup victory, will retire at the end of the season a year before his contract with the German champions expires, the 33-year-old defender said on Tuesday.
European Club Association (ECA) president Karl-Heinz Rummenigge described FIFA's 48-World Cup as "nonsense" on Monday and warned soccer's governing body that the balance of power in the sport was shifting towards his members.