Good points. Even when winning the manager should obviously be looking at ways to improve. I remember the famous Ferguson rant a while back after Aberdeen had actually won the Cup. Great first half, poor second to sum up. You pinpoint it exactly, mental and physical reasons. Physically it is a question of fitness, as you state, and the use of substitutes. Mentally, concentration yes...often goes when you're knackered, but also the worrying way we tend to not exercise control when ahead. To use Pack as an example, there were numerous times in the second half when Forest were building up a head of steam when he had the opportunity and plenty of time to bring the ball down and make a simple pass but instead chose to kick or head upfield as far as poss, give back possession and invite pressure. Great win though.