Mats Sundin and Kenny Jonsson. The only time I've ever seen Mats take a selfish penalty was when they played against another. Odd things is, during that playoff series they didn't seem to interact much.
I thought they hated each other and that hate grew more after Jonsson didnt invite Sundin to his wedding.
I think there's hatred between Tiger Williams and Mike Bossy? Many years after they both retired, Tiger was on TV (I think Off the Record w/Michael Landsberg) and called Bossy a *****.
I thought it was Tiger Williams who said something to the effect of "I'd give my right arm if Bossy was on the team". This was after the '82 Finals when Bossy won the Conn Smythe against Tiger's Nucks.