The ornamental design for a ground-inserted surfboard support, as shown and described.
FIG. 1 is a perspective view of a ground-inserted surfboard support
according to my design;
FIG. 2 is a front elevational view of such ground-inserted surfboard
support, the rear elevational view being identical thereto;
FIG. 3 is a side elevational view of a ground-inserted surfboard support
showing my present design, the opposite side elevational view being
identical thereto;
FIG. 4 is a top plan view of the ground-inserted surfboad support showing
my design; and,
FIG. 5 is a bottom plan view showing a ground-inserted surfboard support
having my design.