The ornamental design for a sporttop, as shown and described.
FIG. 1 is a front view of a sport top according to the design;
FIG. 2 is a rear view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a front perspective view thereof;
FIG. 6 is a rear perspective view thereof; and,
FIG. 7 is a rear view thereof.
The broken line showing of the arms, neck, torso, and head in FIG. 7 is for the purpose of illustrating portions of the environmental structure and forms no part of the claimed design. The crosshatched lines shown on the straps and upper portion of the sport top in FIGS. 1-7 represent a transparent, translucent, or see-though mesh fabric only and do not represent any particular colour, material, texture, pattern, or finish of mesh fabric.