The ornamental design for a basketballnet, as shown and described.
FIG. 1 is a plan view showing the panel components of the design in a pre-assembled state;
FIG. 2 is a front view of the assembled design in a flattened state;
FIG. 3 is a back view of FIG. 2; and,
FIG. 4 is a front view showing the design in association with its environment.
The broken lines representing the attachment seams between the panels, lettering, the borders on the reverse sides of the panels and the basketball goal structure forming the environment disclosed in FIG. 4 are all for illustrative purposes only; and form no part of the claimed design.