Pressure builds on Sahin as Holstein Kiel pound struggling BVB

Borussia Dortmund's struggles in the league continued with a 4-2 loss at Holstein Kiel on Tuesday, raising the heat on under-fire coach Nuri Sahin.

Dortmund were heavily favoured against their promoted opponents, who sit second-last in the table, but were overrun as Kiel scored three goals in 22 first-half minutes.

Shuto Machino, Phil Harres and Alexander Bernhardsson found the net to have Kiel up by three at half-time.

Dortmund's Gio Reyna and Jamie Gittens scored in the second half but the visitors could not pull off an unlikely comeback, with Jann-Fiete Arp scoring Kiel's fourth in stoppage time.

Captain Emre Can said Dortmund's woes were "nothing to do with the coach -- we as players are responsible".

"With all due respect to Kiel, we can't play like that. It's a matter of honour," the 31-year-old added.

Kiel have now won two of their last three to boost their chances of avoiding a direct relegation.

With half the season played, Dortmund sit ninth, 14 points behind league leaders Bayern.

Questions will continue to be asked of coach Sahin, who replaced Edin Terzic in the summer, despite the latter taking Dortmund to the Champions League final in June.

With want-away forward Donyell Malen joining Aston Villa just an hour before kick-off, Sahin handed teenage forward Julien Duranville a starting XI debut.

In cold, foggy conditions on Germany's northern coast, Dortmund dominated possession for much of the first half-hour, but were unable to break through the dogged hosts.

With 27 minutes gone, Kiel forced Julian Brandt into an error near his own penalty box, Bernhardsson then found Machino who blasted in the opener.

Harres, a fourth-division player this time last season, doubled Kiel's lead with a clever header on the counter shortly afterwards.

Kiel hit a third just before half-time, Bernhardsson tapping in a Harres cross to have Dortmund reeling.

Despite goals by Reyna and Gittens inside the final 20 minutes, Dortmund were unable to find a leveller, even as Kiel's Lewis Holtby was red carded with four minutes remaining.

Local boy Arp then struck in the eighth minute of stoppage time to seal a famous Kiel win.