If Muhammad Ali was once named the Louisville Lip, perhaps Juergen Klopp deserves to be known as the Stuttgart Smile. That famous grin regularly spreads across his face, goofy and infectious, whether provoked by one of his schoolgirl giggles or helping to deliver another memorable sound bite. Klopp’s mouth must be the most distinctive in the business.

But, thanks to Bayern Munich, the the perma-grinning, endearingly wacky Borussia Dortmund coach has had little to justify that smile of late. Deposed as Bundesliga champions and knocked out of the DFB Pokal by Jupp Heynckes's all-conquering side,

Jupp Heynckes’s last Bundesliga match was more emotional than anyone predicted, but if the legendary Bayern Munich coach wants to end his career with the high of a Champions League victory he’ll need to stop a poor run of form in big games against Borussia Dortmund.

The day before Alex Ferguson’s 1,500th and last match at Manchester United ended in a bizarre 5-5 draw at West Brom, another veteran coach saw his Bayern team win a crazy seven-goal thriller against the club closest to his heart, Borussia Moenchengladbach. United blew a 3-0 lead but Bayern came from 3-1 down to win 4-3.

Heynckes,

There is a term that exists in the famously expressive German language that has become attached, somewhat unfortunately, to Michael Ballack. After losing a number of major finals, the once great midfielder became known as 'der ewige Zweite' - 'the eternal second'.

Ballack, it is said, was cursed on the very biggest occasions - a curse which begun when he was a runner-up in the Bundesliga, the German cup and the Champions League with Bayer Leverkusen in 2002 as the club earned the nickname Neverkusen for the most agonising series of near misses.

Though extensive domestic success followed with

Borussia Dortmund's star player, Mario Goetze, is out of the Champions League final. There's no way to spin this as a good thing.

The fans may have turned against him in light of his summer move to Saturday's opponents Bayern Munich, but he remains a key player for Dortmund.

Or rather, remained, because his thigh injury means he has played his final game for the club.

It's a big blow for a team that need all their big guns firing against a side that finished 25 points ahead of them in the Bundesliga table.

But ruling Goetze out three days before the final is the smartest move Juergen Klopp

Saturday's all-German Champions League final at Wembley features two vastly accomplished sides who play a similar brand of football.

But which of Borussia Dortmund and Bayern Munich have the more talented players?

Tom Adams assesses the likely starting XIs...

BORUSSIA DORTMUND (4-2-3-1)

GK: Roman Weidenfeller (Champions League appearances in 2012/13: 12)

The Dortmund keeper has a reputation as a smart shot-stopper and has amassed 266 Bundesliga appearances since joining the club from Kaiserslautern in the summer of 2002. Weidenfeller has never been deemed good enough to join the prestigious

A year ago this week, Bayern Munich goalkeeper Hans-Jorg Butt was the captain of his team in a friendly against the Netherlands.

The 38-year-old had enjoyed a wonderful career playing for Hamburg, Bayer Leverkusen and Bayern Munich. He was involved in three Champions League finals. And lost all three.

First, when his Leverkusen side reached the 2002 final against Real Madrid, a game remembered for Zinedine Zidane’s perfect volley - but by not Butt.

"We were 2-1 down and I headed wide of the post in the final minutes," he says. Not for the first time, Butt’s name would have been on the

One of Juergen Klopp’s most memorable lines this season was his take on Borussia Dortmund’s rivals and fellow Champions League finalists Bayern Munich back in March. “Right now,” he said, “it’s a bit like what the Chinese do in economics or industry. Watch the others and plagiarise what they do. Take the same path, only with more money and other players. And for the moment, you will be better again.”

For some imitation is the highest form of flattery. But not for Klopp. Bayern, he felt, had copied Dortmund’s playing style, their 'gegenpressing'. How unoriginal. A month later, it would also

Ahead of the Champions League final between Bayern Munich and Borussia Dortmund, we take a look at some of the key battles on and off the pitch.

First let's start with the men behind the teams - they couldn't provide more of a contrast.

1. Heynckes v Klopp

Jupp Heynckes is a wise old head, with a glittering CV boasting titles in several countries. He is a Steady Eddie as opposed to charismatic genius, although his success highlights how underrated a stable guiding hand can be for the big clubs with messy dressing rooms. It is a shame he is retiring as he has turned Bayern from a bickering