The ornamental design for a basketball themed sportsandal, as shown and described.
FIG. 1 is a top view of the basketball themed sport sandal showing my new design;
FIG. 2 is a left side view of the basketball themed sport sandal of FIG. 1;
FIG. 3 is a right side view of the basketball themed sport sandal of FIG. 1;
FIG. 4 is a rear view of the basketball themed sport sandal of FIG. 1; and,
FIG. 5 is a front view of the basketball themed sport sandal of FIG. 1.
The bottom of the sport sandal is flat and is unornamented. The broken lines in the figures are included to show the structure of the sport sandal, and form no part of the claimed design.