Real Madrid face Atletico Madrid in the Champions League final on Saturday and we'll either witness an incredible Atleti double or Real's agonising wait for La Decima end in glory. It's a fascinating battle with sub-plots aplenty in the build up to the showdown in Lisbon.
Diego Costa and Cristiano Ronaldo are injury doubts for their respective sides, while the latter could win his second European Cup in the town where he started his career. Carlo Ancelotti, meanwhile, is hoping for a third Champions League medal having won it twice at AC Milan.
We've got both sides covered, with ESPN bloggers Nicholas Rigg and Joseph Walker facing off representing Real Madrid and Atletico Madrid respectively. Both sides get the same questions, so let's go...
Match Memories
Nicholas Rigg: Atletico Madrid may have endured years of pain against their city rivals but they have more than made up for it in the past year. Before last season's Copa del Rey final defeat, Real Madrid just didn't lose El Derbi. They had enjoyed 25 matches in a row without defeat -- stretching 14 years -- but that went up in smoke following a 2-1 loss that had just about everything.
Cristiano Ronaldo, Gabi and even Jose Mourinho saw red and Atleti returned to Madrid's own turf and won again in the league this season, thanks to Diego Costa's winner.
Joseph Walker: The best one for Atletico fans in recent history would be the Copa del Rey final last season. Atletico won 2-1 after extra-time to record their first victory over their rivals since 1999.
It was an incredible cup final -- Ronaldo, Gabi and Mourinho got sent off and both sides missed a string of great chances. The win was made all the sweeter by coming on enemy territory at the Bernabeu and it also provided a springboard to greater things.
Sum up the rivalry
JW: It's fierce -- Los Rojiblancos hate Real Madrid. They are seen as the self-entitled, cash-rich enemy who struts around town with an expensive haircut and designer suit. Their stadium can be found in the business district north of the city, swarmed by tourists and over-priced restaurants. They've spent an untold amount since they last won the Champions League and employ the two most expensive players in football history.
This is a stark contrast to the humble souls who play at the Calderon on the other side of town in a more working class area in the south of the city. Los Colchoneros have to sell their best players year after year and develop their own stars.
NR: The rivalry has simmered in the past but not really touched the levels of intensity shared between Real Madrid and Barcelona -- until this season, that is. The success of Real and the lack of it for Los Rojiblancos hasn't helped the rivalry, especially with Atletico suffering relegation.
The best one-off derby atmospheres were always experienced at the Vicente Calderon but fans at the Bernabeu this season knew they had a battle on their hands this time around. It's been fantastic for the city, with companies taking pride in their leading clubs' success by installing large messages of congratulations and giant-sized replicas of their respective shirts on buildings.
The Spanish capital is alive with football and for a change it's coming from both ends, not just the north.
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Fear Factor
NR: The immediate choice would be Costa but the bustling forward is unlikely to be fit, despite trips to see a "miracle doctor" this week in the hope of being ready.
The beauty of Atleti's success in La Liga this season is that they've done it as a team and without individual stars or household names. Despite that, Koke's influence on Saturday could be crucial. The 22-year-old can play across the midfield but is likely to take up a wide role and will be a real handful for Madrid's full-backs. The Madrid-born midfielder is top of the assists chart for Atleti this season with 13, trailing on Real's Angel Di Maria, who has 17, in La Liga.
He can produce a great set-piece, highlighted at the Camp Nou at the weekend when he provided the corner for Diego Godin to score the goal that eventually saw Los Colchoneros crowned champions for the first time since 1996.
JW: It has to be Gareth Bale and Ronaldo, doesn't it? Ronaldo may be carrying a knock but you get the feeling he would crawl on to the pitch to make it to Lisbon.
You can almost picture it -- La Decima won thanks to Ronaldo delivering it in his home country. He will be dangerous, injured or not, while Bale is frightening when he gets going.
X-FACTOR
JW: All the Atletico Madrid players have the X-Factor. It might sound ridiculous but this side have just won the league so who wouldn't fear them? Morale will be high after clinching La Liga and although Costa is a major doubt, Atleti are a better team unit than their adversaries.
In particular, Thibaut Courtois could make the difference. He was outstanding in the Copa del Rey final last season, with one of the great goalkeeping performances of recent times.
NR: Ronaldo and Bale are the two stand-out candidates thanks to their form throughout the season. He may not be 100 per cent fit for the final, despite claims that he will be, but an under-par Ronaldo fitness-wise is still a player to be feared.
Prediction
NR: With Ronaldo fighting fit and Los Blancos desperate to make amends for their shortfalls in La Liga I'll go for Real Madrid to edge it 2-1 and lift their tenth European Cup.
JW: Los Rojiblancos are undefeated in the competition this season and I fully expect it to stay that way. Their defence is so mean, having conceded only six en route to the final, that I genuinely can't see Real Madrid scoring.
Atleti don't play the kind of football that allows Real Madrid to play on the counter attack. I'll go 2-0 to Atletico -- it will be La Primera rather than La Decima.