The strongest leagues in world football have been revealed and it is not pretty reading for the Scottish Premiership

The debate has always raged about whether Celtic and Rangers would be able to compete in the Premier League . Ally McCoist: The demise of Rangers and Celtic is nothing short of staggering

Some say the Scottish giants could challenge for a top-six spot, some say they'd finish in mid-table and some say they'd be relegated.

Though this season is not good for the Glasgow clubs' argument with Hearts threatening to become the first non-Celtic or Rangers club to win the title since 1985.

But according to the list of the toughest leagues in world football , regularly updated by Opta, there's only one answer.

Using stats relating to the average ratings of every team in

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