I think he won't. Because this is what he said about last year's decision:
During all that, you make the decision of not playing on clay …
– Yes. Late on, actually. Because I was on clay. I told myself: I’ll see how I feel, where I’m at. Honestly, it was a coin-flip situation. I remember exactly where we were and how we decided. My entourage told me:
‘If you do it, Roger, think it over carefully. Because it will be a month where you’ll work like crazy. It won’t be easy, and what will it get you? Because if you don’t win Roland … And my physio was worried about my knee that had bugged me the year before. My conditioning coach, Pierre [Paganini] told me: ‘Listen, there’s so much work to do before playing on clay, and, in the end, what’s the goal? Just playing? It’s your decision.’ The coaches told me: if the priority is Wimbledon, you have to really think about it. Twenty-four hours later, I told myself: bah, you know what? OK, it’s tough, but it’s wise.
It was the first time in my life I said no to a Slam while feeling healthy. Because the year before I pulled out of Roland with a bad back and knee, and I couldn’t play the US Open because of the knee. There was a solid reason each time. But this was a first and it was weird, yeah …
In hindsight, wasn’t it the best decision you made this year?
– No, no. It doesn’t give me any pleasure withdrawing from a tournament. I’m still a competitor. In hindsight, it wasn’t a bad decision, but it wasn’t a good one either, if it had turned out I could play on clay anyway, and still play on grass after, like I’ve done my whole career, in fact. Even in hindsight, I see what you mean, but I won’t accept it. It was an important and difficult decision to make because I was healthy.
Sounds to me like someone who instinctively regrets a decision that had to be made but also realises it was correct. And that logic applies just as much this year if not more.
Full interview:
https://tennistranslations.wordpress.com/2017/12/