Line art version: [link]
One of my favourite doubles team (Niou & Yagyuu) in the series Prince of Tennis. Niou's (light-haired) hair was a bitch to colour, which also took the longest to complete... But I'm glad it turned out all right eventually.
Please excuse my accuracy of this fanart, they may not look 100% alike compared to the anime, but I'm actually quite happy with the outcome ^_^
Prince of Tennis (c) Takeshi Konomi