The Nets’ facility in Brooklyn and the Knicks’ campus in Tarrytown are supposed to be shut down under the state’s order. A person familiar with the NBA situation said plans are still fluid, but players on teams located in COVID-19 hot spots such as the Nets and Knicks would be helped out if May 1 becomes the day for opening league facilities. At the facilities that do open around the league, players can participate only in individual workouts — and not group sessions — the person said.