I played against an equally matched opponent two days ago. I was leading 2-0 at half time playing at home. I played defensively from the start of the match and all of my bonus were 10% and I mainly boosted possession bonus. Right after the break, the rating for two of my CB dropped to 5.0 and later 4.x and opponents started scoring goal like it was a totally different match. I ended up losing 2-5.