1girl, ass, back, bangs, blush, breasts, eyebrows_visible_through_hair, frilled_panties, frills, greyscale, long_hair, looking_at_viewer, monochrome, outdoors, panties, pleated_skirt, ponytail, racket, skirt, smile, solo, sportswear, tennis_court, tennis_net, tennis_racket, tennis_uniform, underwear, visor_cap