[QUOTE] The truth is that there are still a few rather large chinks in Karlovic's amour. Outside of his serve and acutely-angled volleys, Karlovic has a limited arsenal. He has trouble sustaining himself in long baseline rallies. His forehand is hit fairly flat and has a tendency to sail, especially when he is stretched out wide on the run. He is more tentative on his backhand wing, feathering gentle slices, in place of stinging drives. He is most vulnerable when returning serve, relying on tiebreakers to win most sets.