Brendan Rodgers' side travel to Bavaria for their first clash with the German champions this Wednesday, with the return match coming at Celtic Park on October 31.
Following Bayern's 3-0 defeat to PSG in the last round of group matches - and Celtic's 3-0 win over Anderlecht - the Bundesliga side's progression to the knockout stage of the tournament doesn't seem as certain as it might've previously, and the game in Glasgow could be pretty crucial.
Bayern fans on the pitch after winning the league in 2016. Image: PA
According to the Daily Record, Bayern have been handed just 3,200 tickets for their trip to Celtic Park but more than 34,000 have actually applied.
Police are reportedly worried that home fans could be willing to sell their tickets to away fans that would mean Germans in the home end and lead to policing issues. Bayern fans are being warned they will be ejected from the ground if they are in the Celtic end.
A source told the Scottish paper, "We could not believe the number of Bayern fans who applied for tickets. With 34,500 applications, that represents half of their stadium in Munich. It also means 10 German fans wanted to come for each ticket available.
"We are just keeping our fingers crossed that we don't end up with a similar situation to Cologne in London."
Koln fans set off flares. Their appearance in the home end split opinion of fans. Image: PA
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Police were on high alert at the Emirates and there were some ugly scenes in north London. Image: PA
Back in September, Arsenal were shocked when more than 20,000 Koln supporters turned up in north London for the clubs' Europa League tie - and it remains to be seen if we see similar scenes in a few weeks' time.
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