Nadal turned 19 the day he won his first at Roland Garros in 2005 , while Djokovic was 20 when he won the 2008 Australian Open .
One thing to keep in mind : Federer was 21 when he won his first Grand Slam .
Nadal turned 19 the day Federer won Federer 's first at Roland Garros in 2005 , while Djokovic was 20 when he won the 2008 Australian Open .
One thing to keep in mind : Federer was 21 when he won his first Grand Slam .