Ranked #5 men's tennis player in the world (as of January 19 of 2010).
Will be ranked #4 with good performance in Australian Open.
Turned professional in 2005.
Beat Rafael Nadal in straight sets, then Roger Federer in 5 sets to win the U.S. Open. Del Potro's defeat of Federer is considered to be one of the biggest upsets in tennis history.
Won the bronze medal at the 2012 Olympic Games by beating Novak Djokovic.