The bolded red doesn't seem to be right. There are other minor disagreements, but it is a matter of opinion (for example, I don't understand how Djokovic's 2012 and 2013 seasons can be "Great", but 2015 only "Very good". Also 2009 "Poor"? Don't understand also how some seasons are given as two things at once, and some are not)
To clarify, I use “Very good” to define only the very best seasons, such as Djoker’s 2011 or 2015. “Great” is used to define a second-tier season, like Federer’s 2009 or 2017; still awesome, but slightly less so.
In hindsight, I probably should have rated Djokovic’s 2009 season. He was at least better than in 2010. Editing now