4. French Open 2009
vs Robin Soderling
Again, it may not have been the most thrilling final as Federer smashed the Swede 6-1 7-6 6-4, but in terms of importance, it ranks as one of the best.
Not only was this his one and only French Open title to date; it also made sure he completed a Career Slam and it equaled Pete Sampras' record 14 Grand Slam titles.
Federer had been on the end of three consecutive final defeats at Roland Garros to Rafael Nadal in 2006, 2007 and 2008.
However, for the first and only time ever, Nadal - dubbed the 'King of Clay' - was beaten on the Paris red dirt by Soderling in round four.
Soderling, therefore, was not be taken lightly. Nevertheless Federer completed a demolition in under two hours.
Tommy Haas had the Swiss star on the brink of defeat in round four but he was beaten along with home favourite Gael Monfils and Juan Martin del Potro on the way to glory.