109 titles seems the hardest of those records to break, but it's not at all impossible to envision Fed winning 10 titles every year for the next six years.
Pete's record of ending the year at #1 six times in a row. Roger could tie that in 2009 and break it in 2010.
Win streak. I think the record is Borg at 49. To break that, Roger would have to win Dubai, Indian Wells and reach the QF of Miami.
oh yea, i can't believe i missed pete's 6 straight years at #1. i believe its vilas who holds that win streak record. and i don't see a problem for fed breaking that streak. he usually does so well in defending titles...