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.

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The Croatian may be on to something as he couldn't pull off a win against Giles Muller in the final of the Ricoh Open. Losing in straight sets, 6-7 (5), 6-7 (4), Karlovic couldn't capitalize on key points to claim the victory over the lefty with the two-handed backhand.

In any case, Karlovic will be a huge threat this grass-court season.

Follow Niko on Twitter: @nikovercelletto