I don't think so because from what I saw this season and I watched every Juve game our players were way more fresh than the opposition at the end .For example,Torino game,Roma fist game,not to mention Milan and other games.I think that this is a mental problem which I can't define.
Yesterday we played 70 minutes perfectly not allowing Roma rats any single chance.We scored and they got a red .In every possible scenario we have to butchered them with a few goals more.Instead we defend and they attack with 10 players!!!! Not understandable .