Dortmund sign Swiss 'keeper

Berlin - Swiss international goalkeeper Roman Buerki has joined Borussia Dortmund from relegated Freiburg on a four-year deal, the Bundesliga club said on Sunday.

The 24-year-old, who played all 34 games as Freiburg were relegated this season, will provide competition for the 34-year-old German international Roman Weidenfeller.

Having picked up two caps for Switzerland this season Buerki signed with Dortmund until 2018 for a reported sum of €4.5 million.

He is the third player to join since Thomas Tuchel took over from Jurgen Klopp as coach as midfielders Gonzalo Castro joined from Bayer Leverkusen and Julian Weigl signed from Munich 1860.