Ravshan Irmatov and Viktor Kassai will referee the World Cup semifinals, FIFA said on Monday. Uzbekistan's Irmatov will take charge of the Netherlands-Uruguay match, and Kassai will officiate the Germany-Spain match. Hungarian referee Viktor Kassai officiates during the World Cup round of 16 soccer match between the United States and Ghana at Royal Bafokeng Stadium in Rustenburg, South Africa, Saturday, June 26, 2010. [Xinhua/AFP Photo]