Wellington Sevens: Sonny Bill Williams learns lessons in dramatic NZ victory

    Story highlights

    • NZ wins Wellington Sevens title
    • Beats South Africa with late try
    • Blitzboks lead overall series

    (CNN)Sonny Bill Williams was the center of attention at this weekend's Wellington Sevens, but the All Blacks rugby star admits he is still learning his way in the shortened version of the game.