The Top of the Key
The top of the key in basketball is a location on the court referring to the topmost point of the arched line that connects both sides of the free throw line. The rectangular, painted part of the court with the semicircle at the top is known as the key. The top of the key is where the key and the three-point line meet, just past the free throw line. This is a popular shooting spot, so it's common in zone defenses to have a player cover the top of the key.