Bayern fans protest against ticket prices during the game at Anfield.
CNN  — 

Supporters of Liverpool and Bayern Munich cast rivalry aside during their high-octane Champions League clash Tuesday to protest against the rising cost of ticket prices.

Bayern’s supporters unfurled a banner early in the second half of the goalless draw that read: “Away ticket LFC 48£ FCB 55€”.

“Th€ gr€€d knows no £imits! Twenty is plenty.”

The gesture was applauded around Anfield by Liverpool supporters.

The “Twenty is plenty” refers to the campaign launched in England by the Football Supporters’ Federation for clubs to cap ticket prices for visiting supporters at £20.

Earlier this month, the English Premier League announced that its clubs would continue to cap away tickets at £30 for another three seasons after introducing the plan for the start of the 2016-2017 campaign.

This is not the first time Bayern’s fans have protested against the cost of ticket prices.

Bayern fans display a banner as they protest against ticket prices during the Champions League  match at Anderlecht in 2017.

In 2017, Bayern supporters threw fake money onto the field of play during the Champions League victory at Belgian side Anderlecht after being charged €100 to watch the tie.

In response, Anderlecht was ordered to partially refund Bayern supporters after the competition’s governing body UEFA ruled ticket prices were excessive. Bayern was fined by UEFA for the protest.

The German club also staged a protest at Arsenal in 2015 during a Champions League tie.

Liverpool supporters also have been vociferous in their criticism of ticket prices.

Around 10,000 walked out in the 77th minute of the Premier League game with Sunderland in February 2016 in response to rising season ticket prices.

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The applause from the Liverpool supporters was as raucous as it got at Anfield with neither team managing to find a breakthrough.

“It was an intense game for both sides,” Liverpool manager Jurgen Klopp told BT Sport. “It is not a game we will remember in 30 years. It’s the result we have and we will work with that.”

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Goals were in short supply across the Champions League on Tuesday.

Barcelona's Lionel Messi endured a frustrating night against Lyon.

In the night’s other game, Barcelona was held to a goalless draw by French side Lyon.

It was the first night of Champions League football without a goal since March 15, 2016, when Manchester City was held by Dynamo Kiev and Atletico Madrid finished goalless against PSV Eindhoven.