Emotion the key for inconsistent Dortmund against Barcelona

Last season, Dortmund stumbled to fifth in the Bundesliga, their lowest placing in a decade, while piloting a shock run to the final at Wembley, where they put in a strong showing in a 2-0 defeat to Real Madrid.

Their European campaign included wins over Paris Saint-Germain, AC Milan, Atletico Madrid, Newcastle and PSV Eindhoven. This year, Dortmund sit eighth in the league and are in danger of missing the Champions League for just the second time since the 2010-11 season.

Dortmund have, however, once again saved their best performances for the European stage, including a 7-1 demolition of Celtic at home and a 3-0 triumph over Sporting Lisbon away.

Dortmund are through to the final eight, where they again face Hansi Flick's Barcelona. Dortmund pushed Barcelona in their group stage match in December, going down 3-2 to an 86th-minute goal from Ferran Torres.

'A very emotional place'

World Cup winner Jurgen Klinsmann said Dortmund's problem, both in the league recently and in last season's Wembley showpiece versus Real, had nothing to do with the quality on the pitch.

In an interview with AFP and other media on Monday, Klinsmann, who played for and coached Dortmund's rival Bayern Munich, said the key for Dortmund was getting - and keeping - their emotions in check.

"Dortmund have all the potential in the world to go and challenge for the title, in last year's final against Real Madrid, you know they are among the top teams in Europe. Then you see they are so inconsistent and not getting things done, especially in the league. And you start to wonder."

Calling the club "a very emotional place," Klinsmann said "when things don't work out like they have this season, they cannot get things emotionally under control."

"I was at Wembley and I thought they should have won this game, actually. In the first half, they were a better team than Real Madrid.

"And then they gave the game away. And they gave the game away because they became emotional. They got nervous, they thought 'actually we can win this thing against big, big Real Madrid'. And this is something that Dortmund always fights with, you know, because it is just so important to the people there."

Kovac making his mark?

After Dortmund twice drew level before falling behind against Barcelona in December, former manager Nuri Sahin said the team's frustrating performances had him "boiling inside".

Sahin was sacked in January, replaced by experienced mentor Niko Kovac, a no frills coach known for a focus on discipline, rather than some of his more emotional Dortmund predecessors.

Dortmund have won three of their past four under Kovac and look to be benefiting from the former Bayern and Monaco manager's simplified approach. Dortmund will need to keep track of Barcelona's incredible attack who have scored 83 goals - more than anyone else in Europe's top five leagues this season.

Front and centre is former BVB striker Robert Lewandowski, who loves scoring against his former club. He has 27 goals in 27 games against Dortmund - more than against any other team.

Dortmund's job will be made harder by the absence of Nico Schlotterbeck, perhaps their best player this season alongside prolific striker Serhou Guirassy.

Schlotterbeck was ruled out for the remainder of the season on Monday with a torn meniscus, while fellow centre-back Niklas Suele is also in doubt, having missed two games with a hematoma.