The former umpire's son, Rudi Koertzen Jr, confirmed the tragic news.
Siddhanta Pinto meets fans from different countries during the quarter-finals between Brazil and the Netherlands, and Germany and Argentina.
Ghana's "Black Stars" hope to go where no African team has been before and reach the World Cup semi-finals on Friday, while Brazil face Netherlands in the day's first and equally intriguing quarter-final.
Former South African skipper AB de Villiers is all set to take part in the upcoming Mzansi Super League.