Serena Williams, tennis star, mature lady, athletic build, curly brown hair, bright smile, elegant makeup, golden necklace, sporty casual wear, white tank top, short skirt, sneakers, confident pose, standing, tennis court, green grass, sunny day, clear blue sky, modern architecture, sleek lines, glass walls, minimalist interior design, natural light pouring in, 3/4 composition, shallow depth of field, warm ambient lighting.