Teenage tennis sensation Bianca Andreescu has won the U.S. Open women's championship, defeating Serena Williams in a dramatic final match.
The 19-year-old won 6-3 and 7-5, also becoming the first Canadian to win a Grand Slam tournament.
Andreescu has not lost a completed match in over half a year.
She began the year at number 152 and has now risen to 15th.
Her latest win will make her Number 5 in the world.