Oliver Kahn says Bayern Munich "absolutely have to stop" allowing opposing teams back into games after they nearly squandered another lead in the 4-2 Champions League win at Viktoria Plzen.

Goals from Sadio Mane and Thomas Muller, as well as a Leon Goretzka double had Bayern four goals up and cruising at half-time against the Czech champions.

But two second-half strikes from Plzen led to worries Bayern would let another advantage slip, after conceding a 95th-minute Anthony Modeste equaliser in the 2-2 Bundesliga draw with Borussia Dortmund at the weekend having led 2-0.

Julian Nagelsmann's side held on this time for three points to secure their place in the knockout stages, but Bayern CEO Kahn remains worried over their ability to see out games.

"Four games, four wins and into the round of 16," Kahn posted on Twitter. "A compliment to the team, in this group that was not a matter of course.

"After a furious first half, we let the opponent come back into the game.

"We absolutely have to stop this!"

Our youngest ever @ChampionsLeague player

Congrats to 16-year-old Paul Wanner on making his #UCL debut last night! #MiaSanMia pic.twitter.com/cWTqyvGlyY

— FC Bayern Munich (@FCBayernEN) October 13, 2022