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MONTEVIDEO, June 26 (Reuters) - Uruguay striker Nicolas Olivera, who is in the squad for Sunday's World Cup qualifier against Brazil, was taken to hospital on Tuesday after suffering convulsions, officials said.

The 23-year-old, who plays for Spanish club Sevilla and is a key member of the Uruguay team, was in hospital in the resort of Punta del Este, a hospital official said. He was due to undergo further examinations later on Tuesday.

Meanwhile, Uruguayan Football Association officials said 57,000 of the 62,000 tickets for Sunday's game against Brazil at the Centenario stadium have been sold.

Uruguay are sixth in the South American qualifying group, from which four teams qualify for the 2002 World Cup finals and the fifth plays off against Oceania winners Australia.

But if Uruguay win on Sunday they would move level on points with fourth-placed Brazil and overtake Colombia.