Best nikkor lens for me?

Hi, I'm a newbie in photography. I'm planning to buy a good lens that has a good bokeh with many purposes for portrait, very good sharpness, sports and for low-light situation. Can any1 suggest me? Thank you

Added (1). Thank you very much Fhotoace, How about 35mm 1.8? Is it good enough?

The Nikkor AF-S 50 mm f/1.8 or f/1.4 lens is the portrait lens you want. It will provide good out of focus backgrounds if you shoot close to wide open head and shoulder shots

Sports lenses are either 24-70 mm f/2.8 for shooting court sports (basketball, volleyball, etc) or for field sports, the 70-200 mm f/2.8, 300 mm f/2.8 or 200-400 mm f/4 lenses

The AF-S 50mm f/1.8 or 1.4 would be great for what you need.