Liverpool have joined the interest for Borussia Dortmund attacker Shinji Kagawa.

Manchester United and Arsenal have been tracking the Japan international since the end of last season.

Liverpool boss Kenny Dalglish is keen to add some fresh faces to his squad in January and reports in Germany suggest he has sent scouts to watch the Japanese international in action.

Kagawa has a contract with Borussia Dortmund until June 2013 and Liverpool will have to spend at least £18m if they want to sign the talented star.