Ivo Karlovic, the towering Croatian known for his booming serve, has announced his retirement from tennis more than two years after playing his last tournament match. The 6-foot, 11-inch Karlovic ...

Ivo Karlovic may be known for huge, bomb-tastic serves (and his almost seven-foot stature), but the Croatian doesn't think it's his serve that would make him invincible on the court. In an ...