^^^ Very interesting! Our best league player in these parts in infamous for caving under pressure in tournaments. I definitely feel the difference myself. I own my league on Wednesday nights (amateur side) and usually have a nice round one in tournaments because I'm having fun. Then comes round 2 and I change from having a blast to trying to win... and thus I'm still seeking win #1.
I should've crushed the C-Tier recreation field this past weekend and was only 2 off the lead after round one... then did my usual tank job to finish 3rd. I'll figure it out soon I'm sure, but there is definitely more pressure in tournaments and in league night.. at least for me and others I play with.