It's not as simple as that. The preparation in the days before a competitive game will be completely different to a friendly. I know Klopp mentioned before our Salzburg game that our players had a double training session the day before the match. Having just been ran into the ground the day before, they're not going to be at peak fitness the next day.Which is all but over. If our players are gassing in the second half of pre season games this close to the league start we’re going to have problems.