BERLIN, Feb. 28 (Xinhua) -- Frankfurt progressed into the last four after beating second-division side Arminia Bielfeld 1-0 in the quarterfinals of the German Cup on Tuesday.

Both sides staged fast paced encounter in the opening period with promising chances at both ends of the pitch.

The hosts however showed a clinical chance conversion and broke the deadlock with just six minutes into the game as Danny Blum capitalized on a deflected cross to tap home from close range.

It remained the only goal of the match but the lower league side kept it bowling and pressed frenetically for the equalizer. Nevertheless, their efforts remained fruitless, as the "Eagles" were able to protect the narrow lead to the end.

"I m not satisfied with the team's performance but ultimately I am happy that we have reached the semi-finals," Eintracht Frankfurt's head coach Niko Kovac said.

"We always tried to play offensively minded but we still conceded a goal," Arminia Bielefeld's head coach Juergen Kramny said.

Elsewhere, the other quarterfinal fixture between Borussia Dortmund and third-division team Lotte has been postponed due to an unplayable pitch.

The following fixtures are scheduled for Wednesday: Hamburg encounter Monchengladbach and Bayern Munich clash with Schalke.