herios said:
Then the next question would be:
Is Roger at 35 as good as he was at 28?
"As good" is a difficult question and subjective. I'll leave that for others to argue about.
"As successful" is easier to answer. And the answer we don't know yet.
One cannot be sure if you are talking about the year he turned 28 (2009) and the year he turned 35 (2016). I am going to compare the year he turned 28, to the year he will turn 36 (2017) so far, since 2016 was a season cut short (barely the first half year) due to injury/surgery/recovery.
Here is what he did in the year he turned 28 (2009):
2009 Roger Federer 10,550 points. Year end rank #1
Finals
Runner-up Australian Open lost to Rafael Nadal 5–7, 6–3, 6–7(3–7), 6–3, 2–6
Winner Madrid Open defeated Rafael Nadal 6–4, 6–4
Winner French Open defeated Robin Söderling 6–1, 7–6(7–1), 6–4
Winner Wimbledon Championships defeated Andy Roddick 5–7, 7–6(8–6), 7–6(7–5), 3–6, 16–14
Winner Cincinnati Masters defeated Novak Djokovic 6–1, 7–5
Runner-up US Open lost to Juan Martín del Potro 6–3, 6–7(5–7), 6–4, 6–7(4–7), 2–6
Runner-up Swiss Indoors lost to Novak Djokovic 4–6, 6–4, 2–6
Overall W-L = 61-12 84%
So far in 2017, prior to IW, he has better results in his 36th year. 2045 points in 2017 vs. 1290 in 2009 due to the result reversal of the AO final.
2017: 8-1 89% 1 title - AO
vs
2009: 9-2 82% 0 titles
Obviously, it is not much to go on so far. We will see how 2017 plays out. Another major and a couple of Masters titles, and he will equal 2009 in terms of titles.
Respectfully,
masterclass