How is he nearing the end? He just won 2 slams and reached the Final and SF of the other. He is the second favorite at AO, will win FO, 3rd favorite at USO, and favorite at USO.
He could easily win 2, maybe 3 slams next year.
Those are the results, which are fantastic indeed, however the stats that are more subjective are his speed, movement, and stamina, all of which I think we can agree are rapidly declining.
Rafa this year cramped at the French open ON A STRAIGHT SET victory. He was on his last leg at the USO final having a walk over and having played over all A LOT less tennis than Medvedev through the NA HC season.
Rafa gets really tight and loses confidence noticeably during matches now, we can see it vs Swartzman and Medvedev, two matches that were completely under control and he almost let slip in a bizarre deep in form mid match (not to take away from his opponents, but the shot making deep was palpable).
Rafa was in fantastic form during Wimbledon and what does he do when he sees a grandpa Fed across the net? Start playing his old ultra defensive game. I won’t even mention the AO this year as I do believe he was not 100% physically and had luck not being pushed defensively before the final.
But, these are things you can see if you actually watch his full matches. I love Rafa and want him to take the slam record, if he doesn’t do it next year, he may have one last chance in 2021, but with the young guns maturing even the gulf of talent between him and the rest of the field (without counting the Djoker and Fed) won’t be enough to compensate for age and possible injuries.