Dalila Jakupovic (+170, 239 to 69): At the age of 27, the Slovenian's career blossomed with a maiden semifinal in Bogota, a Grand Slam debut at Roland Garros and quarterfinals in Nottingham, Birmingham and Tashkent (Getty)
November 6, 2018
Check out the 15 players in the 2018 year-end Top 100 who improved their position by the greatest amount since their 2017 year-end placement - plus two honorable mentions.