Why Is Gareth Bale So Angry? (PICTURES)

Gareth Bale was recently unveiled by Real Madrid as the world's most expensive player in football history.

But he failed to make an impact in Tuesday nights match for Wales against Serbia as the Welsh side lost 3-0, which was their sixth defeat in eight qualifiers.

Bale came on as a sub with 30 minutes to play and was lucky not to score after having an effort tipped over the bar.

Wales' Gareth Bale shows his frustration after his free kick goes close against Serbia.

The Real Madrid star is yet to play for the Spanish side and has only played one pre-season game for Tottenham.

His frustration at not being able to contribute is clear as Bale spent the majority of his time on the pitch venting his anger.