Roddick, Hewitt, Safin were strong contemporaries who Federer (the ATG at his peak/prime) dominated...losing to them once at the slams.
Murray and Wawrinka were strong contemporaries who Djokovic (the ATG at his peak/prime) failed to dominate....losing to them 5 times at the slams.
Medvedev, Zverev, and Tsitsipas are weak contemporaries who Djokovic (the ATG at his past-past-prime) dominated...losing to them once at the slams (and even that one loss was more a gift).
LOL.. H2H Roddick vs Fed 3-21, Andy never beated Fed at slam, 1 win Montreal, 2 wins Miami.. Hewitt vs Fed 9-18, Hewitt never beated Fed at slam, made 7 wins before 2004.. Safin vs Federer 2-10, 1 win at slam AO05 and even that was choke from Fed who didn't used match point.
They were weak competition.
Novak vs Murray 25-11, slams 8-2
Novak vs Wawrinka 21-6, slams 5-4
Murray beated Novak at WB and US but Novak already had those slam titles, on the other side Novak stoped Murray from winning AO and RG.
Wawrinka was in the zone for the 3 slams, he met Novak all 3 times, Fed and Nadal only 1 time. Looking overall their H2H Novak did dominated both of them.
Novak-Medvedev 9-5
Novak-Zverev 8-4
Novak - Tsitsipas 11-2
Yes, Alcaraz has beated all of them routine this year. Meddy did played great US21 but he had a highway until the final, Novak felt fatigue.
So overall only 1 win against Novak and Fed at slams by their strongest competitors in easier period outside clay.
My point still stands.