The ornamental design for a reversibleanklesupport, as shown and described.
FIG. 1 is a perspective view of the inner side of a reversible ankle support showing my new design;
FIG. 2 is a perspective view of the outer side thereof;
FIG. 3 is a top plan view of the inner side thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a perspective view thereof shown when applied on right foot; and,
FIG. 8 is a perspective view thereof shown when applied on left foot.
The broken lines showing of the foot in FIGS. 7 and 8 is for environmental purposes only. All other broken lines shown portion of the article which form no part of claimed design.