$9 Tennis Player Man 3D model by blackorangemodels. Available on CGTrader with 54000 polys and 32000 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 1.18 MB), OBJ (OBJ, filesize: 1.24 MB), FBX (Autodesk FBX, filesize: 7.56 MB), BLEND (Blender, filesize: 7.05 MB), GLTF (glTF, filesize: 6.86 MB)