Handy photo! The wiki page for basketball suggests that a node is the correct way to map this (see https://wiki.openstreetmap.org/wiki/Tag:sport%3Dbasketball#Court_without_markings), although perhaps it should be one node per practice hoop, rather than one for the entire paved area? Potentially also add hoops=1 to each node to make things clearer (see https://wiki.openstreetmap.org/wiki/Key:hoops)?