World number two Novak Djokovic led a parade of champions that included Roger Federer and Andy Murray into the third round of the Miami Open.
The best of men's and women's tennis was on display at Crandon Park with the winners of over 30 grand slam singles titles all in centre court action.
It was a dominating performance by the re-energised Federer, particularly in the opening set where he committed a single unforced error.
The maestro broke to open the match on a Karlovic double fault and did not surrender a point on his serve until attempting to close out the set at 40-0.
The 32-year-old Swiss continued his near perfect play in the second set finishing with a total of three unforced errors but could not break the big-serving Croatian, who blasted 13 aces past the 17-time grand slam winner.
But Karlovic's big serve was not able to save him in the tie-break as Federer coolly clinch the match 7-4.
Djokovic, riding the momentum from his victory at Indian Wells into South Beach, jumped out to a 4-1 lead in the opening set before breaking Frenchman Chardy to secure a 1-0 lead.
There was only one break in the second set and that went to Djokovic, who nosed in front 5-3 before serving out for victory.
Murray's slow start
Elsewhere, defending champion Andy Murray took three sets to tame Australian Matthew Ebden 3-6 6-0 6-1 as the clock approached midnight.
Murray, who split with coach Ivan Lendl earlier in the week, got the contest off to an unsteady start when Ebden broke him at the first opportunity and then held serve to quickly jump in front 3-0 on his way to easily taking the opening set.
After storming through the second set, Murray was broken at the start of the third which sent the Briton into a towel tossing rage as he berated himself.
The chastising had the desired result as the sixth seed immediately broke back to get on level terms and raced through the next five games to clinch a convincing victory.
In other action, fourth seeded Spaniard David Ferrer showed no hint of rust as he cruised past Russian Teymuraz Gabashvili 6-4 6-0.
Ninth seeded Frenchman Richard Gasquet also recorded a straight sets 7-6 (7) 6-4 win over Colombian Alejandro Gonzalez.
Venus Williams registered a straight sets win and Li Na advanced in a walkover.