Serena Williams is one win away from an eighth Wimbledon singles title that would complete a fairytale return to tennis.
But as the American prepares for Saturday's final against Germany's Angelique Kerber, we ask how it is possible that a 36-year-old who says she "almost died" in childbirth 10 month ago is on the verge of a record-equalling 24th Grand Slam singles title.
How has she done it, what does that say about the state of the women's game, and how can Kerber beat her?
The S Factor: Aura and intimidation
The mere thought of facing Williams is enough to put some players off their game before they have even started.