Football is the only London 2012 event that has not sold out, with approximately 1.5 million tickets still available.
According to BBC Sport, football is still the biggest selling sport at the games, but only 800,000 of the 2.3 million tickets have been sold.
Showpiece events, such as some of the men''s quarter-final and semi-final ties, have suffered from slow sales.
But organisers have cited a reluctance from fans to buy tickets before the draw is made on 24 April.
A London 2012 spokesperson said: "We are confident that when we know more about the teams and the draw, people will want to be part of the Olympic Games at the football venues across the UK."
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