#5 2018 Australian Open final vs Marin Cilic
#4 2003 Wimbledon final vs Mark Philippoussi
In one of the greatest grand slam finals of all time, Roger Federer defeated Andy Roddick in the 2009 Wimbledon final in five gruelling sets 5-7,7-6,7-6, 3-6, 16-14 to beat Roddick for the third time.
#3 2009 Wimbledon Final vs Andy Roddick
Playing his greatest rival Rafael Nadal once again in a major final, Roger Federer defeated Nadal in five tight sets 6-4,3-6,6-1,3-6,6-3. This was also the last major final between Nadal and Federer.
#2 2017 Australian Open Final vs Rafael Nadal
Roger Federer's most prestigious silverware has to be the 2009 Roland Garros trophy. Rafael Nadal has dominated the French Open and defeated Federer on multiple occasions. Finally in 2009, he defeated Robin Soderling, Nadal's slayer in the final in straight sets 6-1, 7-6, 6-4 to win his maiden and only Roland Garros title and eventually completed the career slam.
#1 2009 French Open final vs Robin Soderling