The Twenty20 concept is best suited to domestic cricket and could be the victim of 'overkill' if overplayed at international level, South Africa coach Mickey Arthur has warned.
Arthur, a self-confessed purist, does not want to see Twenty20 usurp 50-over cricket as the premier limited overs form of the game.
He said two Twenty20 matches per tour was the ideal number.
A crowd of 70,000 is expected for Sunday night's Twenty20 clash between Australia and South Africa at the MCG.
"I think they kick start the tour very, very well. I think there's a huge amount of public interest for it which is great," Arthur said.
"Then every two years you play a world championship. I think that's perfect for international cricket."
"I worry that sometimes you might have three ODIs and a five-match Twenty20 serieson a tour because of the commercial value."
"I think that would be wrong because that would kill the appeal of Twenty20 cricket to the domestic competition."
The Twenty20 Big Bash - Australia's domestic competition - has attracted strong crowds all around the country.
The inaugural staging of the IPL tournament attracted large crowds in cricket-mad India.
Just as one-day cricket initially attracted big crowds domestically before being more frequently played at international level, Arthur said, the same could happen with Twenty20.
"I think Twenty20 is a game for domestic cricket," he said. "The franchise effect of Twenty20 is very, very good."
"I just worry about overkill of Twenty20 cricket with international teams because ultimately your domestic franchises will fill the kill."
"Because as it was in one-day cricket when your one-day cricket started it was really well supported domestically and internationally when it happened obviously everyone wanted to go and watch that more and more."
"I just think at international (level) they have to be careful of killing the Twenty20 concept for the domestic franchises. I think Twenty20 belongs domestically."
South African one-day captain Johan Botha and Australian wicketkeeper Luke Ronchi both believed Twenty20 cricket would one day supersede the 50-over format.
"I don't think it's gone past it yet but it is great," Botha said. "All the guys still know 50-over cricket is still No.1."
"All the people around the world do like Twenty20 cricket because it's so short. It could get past it eventually."
Ronchi said one-day international crowds would drop if there were more Twenty20 matches on the calendar.
"People get to sit there for three hours and they watch the whole game," he said.
"I think that will slowly take over the way it did when the World Series sort of stuff. I think that's the way it will head."
The first domestic Twenty20 match was played in England in 2003 but it was not until 2005 when the game was played at international level.
India won the inaugural edition of the Twenty20 World Cup, officially called the ICC World Twenty20, in South Africa in 2007.
The next tournament will be held in England in June this year.