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.
Robert Lewandowski overtook Pierre-Emerick Aubameyang in the race to be the Bundesliga's top-scorer this season after netting twice in Bayern Munich's 4-1 thrashing of Borussia Dortmund on Saturday.
Runaway Bundesliga leaders Bayern Munich had their 20-match unbeaten run in all competitions ended at Hoffenheim on Tuesday as striker Andrej Kramaric's winner sealed the hosts' 1-0 victory.
Runaway leaders Bayern Munich suffered only their second Bundesliga defeat of the season when they were beaten 1-0 at surprise package Hoffenheim on Tuesday.
Ex-Germany captain Philipp Lahm has confirmed he is taking legal advice over a spoof April Fool's story gone wrong.
Bundesliga leaders Bayern Munich demolished Augsburg 6-0 with forward Robert Lewandowski scoring a hattrick to protect their 13-point advantage over second-placed RB Leipzig who beat bottom club Darmstadt 98 4-0 on Saturday.
Veteran striker Claudio Pizarro capped his 200th appearance for Werder Bremen with a 79th minute equaliser as they drew 1-1 at Bayer Leverkusen, spoiling the hosts' new coach Tayfun Korkut's debut.
Arsene Wenger is under unprecedented pressure to end his storied 21-year tenure as Arsenal manager following their humiliating 10-2 aggregate defeat by Bayern Munich in the Champions League.
For an hour Arsenal were at least salvaging some pride against Bayern Munich, then the ceiling came crashing down as they exited the Champions League last 16 on Tuesday with a matching pair of 5-1 defeats against the merciless Bundesliga giants.
Arsenal manager Arsene Wenger, whose contract expires at the end of the season, will make a decision about his future based on the "bigger picture" and not a recent slump in form.
Arsenal will have to produce the biggest second leg comeback in a Champions League knockout tie to avoid a seventh successive exit at the last 16 stage when they host Bayern Munich on Tuesday.