of Croatia will be looking to have a great run at the Masters 1000 event in Miami this week.
Karlovic suffered a shock straight sets defeat to Nicolas Almagro of Spain in the Masters 1000 event in Indian Wells last week.
If Karlovic can find his best form then he has the game to cause a few upsets this week.
In 2008 Karlovic recorded the best win of his career when managed to beat Roger Federer in 3 sets in the 3rd round of the ATP Masters Series event in Cincinnati Ohio.
In 2003 Karlovic defeated Lleyton Hewitt in the 1st round of Wimbledon when the Australian came into the tournament as the defending champion.
It will be difficult for Karlovic to win the title in Miami but he is certainly capable of claiming some big scalps this week if he plays to the best of his ability.