Leicester City's game against Atletico Madrid tonight could well be the biggest in the club's history.
The fairytale continues for the Foxes, who won the Premier League against all odds last season and are now just two legs away from the Champions League semi-finals.
Even after their historic title triumph under Claudio Ranieri, no one could have predicted they would get this far in the competition.
Four wins in six games saw Leicester top Group G ahead of Porto and secure a place in the last 16, where they faced La Liga's Sevilla.
A 2-1 away defeat in the first leg meant Jamie Vardy and co. needed to pull off another miracle in the second leg - and they did just that.
Goals from Wes Morgan and Marc Albrighton - not to mention a penalty save from Kasper Schmeichel - at the King Power Stadium meant they became the only English side to reach the quarter-finals.
But they face their toughest test yet when they travel to the Vicente Calderon.
Atletico have lost just once in their last 12 games in all competitions and won't want to become yet another victim in Leicester's giant-killing spree.
Craig Shakespeare's side will need to come out of the blocks fast, but one thing is for sure: they'll have the full backing of their boisterous fans.
Leicester's travelling supporters have been somewhat disruptive since arriving in Madrid on Tuesday, with eight fans arrested after causing a mess in Plaza Mayor square.
At around 9.30pm, riot police were forced to get involved when some drunks fans created too much of a disturbance and then resisted.
And it's been much of the same today, with footage emerging of a large group of Leicester fans singing '10 German Bombers' on the streets of Madrid (see below).
Another video shows Leicester fans throwing flares and bottles at Spanish police while chanting: "Spanish b*****ds, Gibraltar is ours", referring to the controversy surrounding Brexit.
Their behaviour hasn't gone down well on Twitter in light of last night's bomb attack on Borussia Dortmund's bus ahead of the Monaco game.
In the eyes of many, singing a song about German planes being shot down in WWII is not only untimely, but disrespectful and embarrassing. Check out the reaction below.