Cristiano Ronaldo only the eighth most valuable athlete brand in the world, Forbes study reveals

Cristiano Ronaldo is the only footballer to feature in Forbes' list of the top 10 most valuable athlete brands of 2015.

The Real Madrid star is eighth in the list, with a value of $16m (£10.4m).

Despite his struggles on the course, Tiger Woods is top of the pile with a value of $30m (£19.5m).

Woods hasn't won a major since the 2008 US Open and missed the cut in three majors this year.

Joining Woods in the top two is fellow American and golfer Phil Mickelson, valued at $28m (£18.2m).

Roger Federer and LeBron James are tied in third with a value of $27m (£17.5m).

Indian cricket star Mahendra Singh Dhoni, sprint legend Usain Bolt, golfer Rory McIlroy and boxer Floyd Mayweather also appear in the top 10.

Forbes' Most Valuable Athlete Brands 2015

1. Tiger Woods - $30m (£19.5m)

2. Phil Mickelson - $28m (£18.2m)

3*. LeBron James - $27m (£17.5m)r

4*. Roger Federer - $27m (£17.5m)

5. Mahendra Singh Dhoni - $21m (£13.6m)

6. Usain Bolt - $18m (£11.7m)

7. Kevin Durant - $18m (£11.7m)

8. Cristiano Ronaldo - $16m (£10.4m)

9. Rory McIlroy - $12m (£7.8m)

10. Floyd Mayweather Jr. - $11.5m (£7.5m)