Bayern Munich coach Jupp Heynckes expects Arjen Robben to sign a contract extension before the end of the season. The Netherlands winger has been in impressive form of late, helping keep the club in the Bundesliga title race and on course for the semi-finals of the UEFA Champions League.\"I personally assume Arjen will put pen to paper sometime over the coming rounds (of games),\" Heynckes said at a press conference ahead of Bayern\'s Champions League quarter-final second leg against Marseille in Munich tomorrow.\"I think that he has shown again how important he is for Bayern.\" The 28-year-old\'s current deal runs until 2013. The Bild newspaper speculated today he will sign a new deal until 2015.