Borussia Dortmund are reportedly on the verge of signing Konstantinos Karetsas, with managing director Lars Ricken confirming from the club's pre-season base in Japan that there is "an agreement in principle between Gent, the player and us". Watch: Cerezo Osaka 1-0 Dortmund - highlightsRecommended editorial content from JWPlayer At this point you will find external content from JWPlayer that complements the article. Allow JWPlayer content I agree that external content from JWPlayer will be shown to me. Watch: Matchday 1 excitementRecommended editorial content from JWPlayer At this point you will find external content from JWPlayer that complements the article. Allow JWPlayer content I agree that external content from JWPlayer will be shown to me.