So many people repeat like parrots the same stupidness about "tired players" because it`s "end of the season" like after it they will have two years for rest and at AO they will appear fresh and new like rose.
In reality after AO, after Miami (who skips MC), after Wimbledon and after US top players have the same
time to rest. Or almost the same, sometimes even more. That`s why it`s stupid to say about some miracle tiredness at WTF and then freshness at AO. It`s closer to reality in WTA where in October season is over and 1/4 of year is free from play till new season.
Returning to topic - WTF is 5th the most important tournament. Nothing to add here.