After finishing the previous season just outside the top-15, Novak Djokovic was ready to rumble in 2007. The young Serb made his debut with the title in Adelaide and reached the fourth round at the Australian Open. Mikhail Youzhny brought him down indoors in Marseille and Rotterdam, before Novak set up another showdown with Federer in Dubai.The youngster took a set in the quarterfinals before losing in three sets to propel the Swiss. At the first Masters 1000 of the season, in Indian Wells, Djokovic reached his first semi-final at that level, playing well in the first four rounds and winning every match in straight sets.Novak suffered three breaks against Robby Ginepri in the first match but beat the American 6-4 6-4. The Ser …