Back before 2010 28 was post peak. Over the past decade science in sport has improved massively allowing players to play much longer in all sports. Lockdown enabled me to watch old matches. I had forgotten how amazing peak Federer was. I had forgotten how unreal Nadal was as well. Both shadows of of what they were. It is why i do not rate Medvedev. Last year he should have taken Nadal to the cleaners in 5th set. Fact he ran out of gas is tragic at his age.Federer was in decline because of age since he was 28?