Coca-Cola has become the first FIFA sponsor to call on Sepp Blatter to immediately stand down as president of world soccer's governing body.

The intervention from the soft drinks giant comes a week after the FIFA president was placed under criminal investigation by the Swiss authorities.

Coca-Cola wants Blatter to step down immediately so that a credible and sustainable reform process can begin in earnest.

The company said with every passing day FIFA's reputation continued to be tarnished.