Staggering 51st unforced error seals Madison Keys' fate

Gauff wins all-American quarter-final after bizarre match in Dubai (Source: WTA)

Video transcript

- Game, set, match. Gauff, with six sets allowed six two of seven.

- Her second career win against fellow American Madison Keys is enough to put Gauff into her second semifinal of the season and her first in Dubai. But next up for her, it will be the world number one Iga Swiatek. What a chance to test her game against the world's best that will be. But tonight, the smiles and the celebration belong to Coco Gauff.