Taking a look at the court speed, both Fed’s and Nadal’s resume are skewed actually. We know AO was slow hard court and USO was fast hard court prior to 2017. Since 2017 the speed has been exchanged. So Fed only won 5 out of 20 slams on slow court: AO04, AO06, AO07, AO10 and RG09. Nadal only won 4 out of 18 slams on fast court: WC08, WC10, USO10 and USO13. Djokovic instead won 7 out of 15 slams on fast court: AO19, WC11, WC14, WC15, WC18, USO11 and USO15.