Because they've bought players who are both extremely talented and have very high fitness levels.
Fitness shouldn't be an issue at Premier League level. Most of our squad aren't even inrernationals. They get summers off, national team breaks, etc.
Is there any difference in our performances when we have 3 games a week vs. 2?
I mean I'd like to have seen us go full stregnth vs Blackburn.
Don’t think that was because the players physically couldn’t play though