The potential organisers of a 2010 Canadian grand prix have refused to comment on the latest reports about formula one returning to Montreal.
It is reported that Bernie Ecclestone last weekend showed team bosses a calendar for next year that includes a round at the Circuit Gilles Villeneuve.
But with the track hosting NASCAR this weekend, a spokesman for the race organisers said it would be "disrespectful to our guests" to talk about formula one right now, according to the Montreal Gazette.
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