The ornamental design for a tennisracketbag, as shown and described.
FIG. 1 is a perspective view of a tennis racket bag;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right-side view thereof, the left-side view being a mirror image;
FIG. 5 is a rear view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 3; and,
FIG. 8 is a cross-sectional perspective view showing one of the pockets of the tennis racket bag in use.
The broken lines depict environmental subject matter only and form no part of the claimed design. The dot-dash lines represent a boundary between claimed and unclaimed subject matter, and form no part of the claimed design.