Fed will not be playing in Monte-Carlo. But, I don't know why this is considered news as it was almost certain right from the beginning of the year that he won't do so. His maximum clay schedule will be Madrid, Rome and RG. His minimum clay schedule would be nothing at all.
His most likely clay schedule will be Rome and RG (assuming he plays some clay). The following is from site tennis-X.
Roger Federer didn’t rule out the clay season, at least not yet, he said yesterday at Indian Wells. The Swiss, who skipped the clay last year, says he will make a decision whether to play on the slippery surface after Miami, but will likely not play Monte Carlo.
“I probably won’t play in the very beginning, you know, meaning Monaco. Also have a Foundation trip I’m doing at that time, so I’m planning that a little bit.
“The rest, I said I will decide after Miami to then decide what I will play if I do play the clay court after that.”
Federer’s decision to skip the clay last year paid off as it kept him fresh enough for another Wimbledon title and healthy for most of the last half of 2017.
Now, a year older at 36, he has to decide again, though with so many top rivals ailing, might he be tempted to make one more push for another French Open a second Career Slam?