Speaking in terms of the final, positive print, if you pick the right coloured filter, it will help you differentiate parts of your subject, by emphasizing (lightening) one colour and de-emphasizing (darkening) others.
A red filter will lighten reds and darken blues and greens. So it will lighten dark brown skin and darken blue and green tatoo ink.
In the example posted, most likely the tatoos have substantial amounts of blue and green in them, and the athletes photographed have dark skin.
And the lighting is really good.
You are probably thinking of using a red filter to darken (blue) skies. By doing that you aren't really increasing the contrast. All you are doing is helping differentiate the sky from the rest of the scene.
There might be a small affect on the contrast due to the fact that the filter will reduce the affect of haze, but that affect isn't particularly intense.