Apparently they were VERY close...
I plucked this part from an ESPN article yesterday;
"I used to think nobody hated losing more than I did or was more miserable after a loss. I decided it was a tie between me and Bill," Manning told (Chris) Mortensen. "And I stay in the building pretty late and he was always here working, too. Personally, my goodness, so many thoughts. He was one of the last guys to leave my wedding with Ashley (his wife). This is very, very tough."