If I am Nadal, I am playing South America clay and then going back to Europe for clay, no Miami
Obviously Indian Wells who does favour his game is missing.... But there is no 500 this year on South American Clay Season so Acapulco with medium slow high bounce HC is a good pick for him....
Then who knpws what can be scheduled in Europe next Spring with Corona around and initial vaccination scheduled in May/June*....
So Miami is probably not a thing to skip before knowing.
* Before everbody jump at my throat like crocodiles saying aggressively that pro athletes will surely get the vaccine before it is on sale, I just answer MAYBE but crowds will not so Spring Clay Events will be with no or low crowd so we have to be cautious about what will happen and what will not.
Not sure all events can be organized with low crowd two years in a row (or being out of or low money as they cancelled last year edition).