Real Madrid star Cristiano Ronaldo admits he will be forced to watch Portugal's World Cup playoff with Bosnia from the stands.

Ronaldo has been ruled out of the tie due to his ankle injury, much to the relief of Real Madrid.

"The result was not what I wanted, but it was what I expected. It is a great disappointment not being able to help Portugal, especially in such a crucial moment like this play-off against Bosnia," said Ronaldo.

"Nobody at this moment could feel more sad than me because representing Portugal will always be one of the proudest things for me as a professional footballer and as a citizen, but I have no choice.

"I'll be at the stadium to support my teammates."