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.
"We were very close, that is the reality. It's painful, but we have to learn from this. We had our moments, especially in the first half," Arteta said.
Arsenal, who have never won the Champions League, travel to the home of Bayern with little time to lick their wounds, targeting their first semi-final in the competition since 2009
Bayer Leverkusen's record-breaking run to their first Bundesliga title was no fluke, with a 16-month plan coming to fruition.
Bayern's win means Xabi Alonso's Leverkusen, 13 points clear of the Bavarians, need to beat Werder Bremen on Sunday to lift the Bundesliga for the first time.
“They are fine and only went to hospital for a routine check-up,” said a spokesperson for the England captain.
The former Tottenham striker enjoyed a prolific record in north London derbies and a summer change of scenery made no difference.
Tuchel's team are on the brink of surrendering the German title for the first time in 12 years after a brutal domestic campaign.
Freund told reporters Tuchel would "100 percent" be in charge for the quarter-final first leg in London, despite admitting "losing twice in a week is incredible".
Bayern Munich squandered a two-goal lead to slump to a shock 3-2 loss at Heidenheim on Saturday that all but dashed the Bavarians' slim Bundesliga title hopes with six games left to play.
Bayern Munich's Bundesliga title hopes all but evaporated following a 2-0 home loss to Borussia Dortmund on Saturday that left them 13 points behind leaders Bayer Leverkusen with seven games remaining.