Gareth Bale had a poor seaon and was also targeted by fans as he was booed and jeered recently.
Defensive lapses have cost Madrid in recent weeks as they have conceded twice in four of their last five matches.
Guardiola said he hopes Barcelona win their first European title since 2011.
Bayern struck back with second-half goals from Lewandowski and Mueller but it was a case of too little too late.
Barcelona have the 3-goal advantage going into the second leg at Allianz Arena on Tuesday.
Bayern goalie Neur was earlier quoted in an interview saying that he would show Messi who the boss is.
Carlos Tevez smashed home a second-half penalty as the hosts stunned holders Real Madrid with a 2-1 win.
Surgical Bayern overturn 3-1 deficit with 6-1 annihilation of Porto to make Champions League semifinal.
Barcelona have a 2-goal advantage going into the 2nd leg at Camp Nou.
Neymar scored a brace while Suarez chipped in with a goal against PSG.
Slovenian Oblak made a string of memorable saves to keep the Spanish champions’ hopes of reaching the last four alive.
Real Madrid will take on crosstown rival Atletico Madrid in the quarterfinals of the Champions League.
The contest also highlighted the gulf that has opened up between Spanish and English football in club football.
Arsenal won the second leg but lost on away goal 3-3 aggregate against Monaco in the Champions League.
PSG managed to stretch the game to the extra time with a David Luiz header and held Chelsea to a 2-2 draw.
Real Madrid survived a major scare as they went through to the quarter-finals despite a 4-3 loss to Schalke at home.
It was a night of upsets as two top teams were edged out in Champions League first leg.
Manchester City suffered from deja vu as Luis Suarez’s double gave Barcelona a 2-1 first leg lead.
A year ago at the same stage City bowed out 4-1 on aggregate against the four-times European champions.
Manchester City take on Barcelona and Juventus face Dortmund as the Champions League gets into its stride.
The victim of a racist incident involving Chelsea football fans will now lodge an official complaint with police.
The world player of the year headed in after 26 minutes for his 73rd Champions League goal .
Xabi Alonso was sent off in his 100th Champions League game as 10-man Bayern was held to a 0-0 draw by Shakhtar.
PSG salvaged a 1-1 home draw against Chelsea in their last-16 first leg on Tuesday.
The champions league is back in town on as the knockout stages commence and we take a look at what is to come.
Arsenal manager Arsene Wenger will face his old club AS Monaco for the first time.
Lionel Messi, Neymar and Luis Suarez led Barcelona’s charge against the Paris-based giants.
Goals from Nasri and Zabaleta completed City’s mission impossible as they qualified for the knockouts.
Real surpassed the previous record they jointly held with Barca, who won 18 matches in a row in all competitions.
Dortmund and Arsenal both finished with 13 points but the German side took top spot with a better goal difference.
Liverpool’s Champions League challenge ended in a 1-1 draw against FC Basel, who booked their spot in the last 16.
City needs at least a point against Roma and some assistance from Bayern in the other Group E match.
Both teams have already qualified Round 2 but Barca has topped its group since 2006-07.
Basel manager Sousa, told reporters that his side hold a slight advantage over Liverpool.
Bayern had already secured top spot in Group E before their trip to the Etihad Stadium.
Liverpool must gather itself if it wants to prolong its first Champions League campaign in five years.