Burki made his Switzerland international debut last month

Swiss club Aarau insist they have had no contract with Celtic after midfielder Sandro Burki was linked with a transfer to the Glasgow outfit.

A spokesman told BBC Sport that they were not aware that the 23-year-old had visited Scotland last week.

It was reported that he was at Celtic's training ground and watched the draw with Aalborg in the Champions League.

And the Swiss club's sporting director was quoted as saying that a transfer could be completed in January.

Fritz Hachler told Swiss newspapers: "I think it is likely that Sandro will move to Glasgow. He was in Scotland last week and we expect the transfer to go ahead."

But Burki is under contract until 2011 and a transfer fee would need to be agreed between the two clubs.

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The defensive midfielder made his senior international debut for Switzerland in a World Cup qualifier against Cyprus last month.

Burki began his career with FC Zurich and spent a brief spell at Bayern Munich before returning home to Young Boys and then Aarau.