I know it isn't the start of the season yet, but I have seen all or part of each of Chelsea's 3 pre-season games here in the US (3 wins from 3 so far).
In the first 2, they looked very strong - both 2-0 victories.
In last night's game v AC Milan they looked under pressure for the first time. Milan really deserved a draw, but Chelsea won 2-1 with a late winner.
Overall, though, they have looked very good.
Liverpool, meanwhile, are win-less and have only scored 1 goal.
ManU have won 2 of 3 (or is 3/3?), but have conceded goals.
Man City lost 2 and drew 1 in South Africa.
BTW - great crowds to watch this tournament in the US - 80,000/70,000/50,000 etc. and these are really just friendlies.