The 2009 Rijeka Open was a professional tennis tournament played on outdoor red clay courts. It was the 3rd edition of the tournament which was part of the 2009 ATP Challenger Tour. It took place in Rijeka, Croatia between 29 June and 5 July 2009. That was the last tournament for Mathieu Montcourt who died on 6 July, 2009 in Boulogne-Billancourt. He played very well in Rijeka, reaching the semifinals where he lost to Blaž Kavčič). A police source said on 9 July 2009 after a preliminary autopsy that Mathieu suffered a cardiac arrest.