I have found that in a couple of recent matches that were tight games, I have subbed a defender and then almost immediately conceded a goal. This happened twice in my CL semi-final and cost me dear as those 2 away goals by my opponent were all he needed to progress on away goals. I think I'll steer clear of subbing defenders unless I'm cruising the game in future. I'm sure the guys who were not too happy about being subbed put a curse on their replacements. Anyone else had bad sub experiences ?