I'll try to get you a pic! He is a croat and has won a challenger and reached two challenger finals this year (he has quite a few impressive wins). He started the season ranked outside the top 300 and, with his Osaka quarterfinals this week, will be ranked about 150.
Yes, he made both the Aussie Open and Wimbledon juniors finals.
Here is a pic:
He has a good all-court game and usually serves and volleys. He is considered to be the next Andy Roddick. He has a huge serve as well (he actually broke a netcord during a challenger match a Ho Chi Minh City).