Murray wont win a clay master series and wont win RG and therefor no matter what kind of math you are working with is no big threat to Federer's nr1 record.
Only Djokovic and Nadal have the potential to have crazy clay seasons while Federer with some early loses in the big ones would be in danger of not breaking the record.
Grr, Murray is still in a better position now than Nadal, or Djokovic.
Federer - Emperor of the Slams, King of Hard, Lord of the Australian Open, Lord of Wimbledon.
Sunset of Age
She's MY Miss MTF
Sweet, Sassy, Sophisticated
"Love has nothing to do with what you're expecting to get, only what you're expecting to give - which is everything. What you receive in return varies, but that really has no connection with why you give. You give because you love and cannot help giving." - K. Hepburn.