Real Madrid take on neighbours Atletico in the Champions League final on Saturday night.
Here's five key talking points ahead of the big match in Milan.
1. Who will win the battle of the bosses?
Diego Simeone and Zinedine Zidane met many times as players, with the latter coming out on top more often than not.
But on the only occasion they clashed as coaches, Simeone guided Atletico to a 1-0 win, inflicting Real's first defeat since Zidane took over from Rafael Benitez.
Can he repeat the trick and secure a first European crown for Atletico?
2. It will be the ultimate clash of styles.
It's Real's Galacticos versus Atletico's street fighters. It's defence against attack. It's Cristiano Ronaldo, who has scored 50-plus goals in six consecutive seasons, taking on a belligerent Atletico side who have kept 35 clean sheets this term.
It's the ultimate culture clash and promises to be an enthralling showdown.
3. Are Atletico out to get revenge for 2014?
Atletico were seconds away from a shock win over their illustrious neighbours in the final in Lisbon two years ago when Sergio Ramos equalised in the third minute of stoppage time.
Real then steamrollered their neighbours in extra-time with Gareth Bale, Marcelo and Cristiano Ronaldo on target in a 4-1 win. But Atletico have not lost any of their last six meetings against Real in any competition.
4. Griezmann could step up and fire his side to glory.
Atletico's chief goal threat will be France international Antoine Griezmann. When these sides met in Lisbon Diego Costa and David Villa were the main men up front.
But since their departure Griezmann has stepped up to the plate and hit 44 La Liga goals in two seasons. Can he fire Atletico to glory in Milan?
5. It will be an English man in the middle.
British clubs may have once again failed to reach the showpiece but at least an English referee will be flying the flag. Mark Clattenburg showed some big-game nerves when he failed to play a couple of advantages for Crystal Palace in last week's FA Cup final against Manchester United.
How will he cope in a derby with Europe's biggest prize on offer?