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 interview in 's-Hertogenbosch, the 38-year-old said one of his biggest regrets is not having a two-handed backhand. The world No. 24 believes that this change may have given him the power and edge he needs to be even better.