Ivo Karlovic and John Isner may have made fourth round exits from the Australian Open, but the pair left their mark at the top of the leaderboard for most aces served in the tournament. The 6ft 10in Karlovic smacked 121 aces in his four matches, while Isner (just one inch shorter) produced 95 aces. Andy Roddick, defeated in the quarter-finals, pounded 94 aces for the tournament.
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