Will Fed get a 0 pointer for a late withdraw from Toronto? He can skip 2 MS1000 due to age and number of matches played.
If he doesn't get a 0 pointer he can count 90 points from Doha instead.
Toronto is a mandatory MS1000 tournament, then if you are allowed to enter and don't take part, you get zero point for that event and can't replace it with another result.
The rule which allows Fed to skip 2 mandatory MS1000 tournaments this year is only for money/official excuses concerns, has no importance for teh rankings.