The world no.2 says the complicated coronavirus situation is to blame.
Rafa Nadal won't be defending his US Open title later this month.
The Spaniard pulled out due to the coronavirus pandemic - saying the situation is still "very complicated" around the world.
The competition begins on the last day of August at New York's Flushing Meadows.
After many thoughts I have decided not to play this year’s US Open. The situation is very complicated worldwide, the COVID-19 cases are increasing, it looks like we still don’t have control of it.— Rafa Nadal (@RafaelNadal) August 4, 2020