The diminutive Argentine is in the midst of a career year.
Roger Federer's serve is an ideal example for players of all levels.
The World No.2 made the announcement after winning his 8th career title at Basel.
The final Masters 1000 event of 2017 is here, and the draw is out.
The Swiss spoke strongly on Simona Halep's year-end No.1 ranking
The legend didn't win her last tournament but she'll finish the season as World No.1.
The Romanian is the 13th player to ever finish a season as WTA No.1.
