[4] She was continuously ranked in the pound-for-pound top ten female fighters by Combat Press between July 2019 and December 2023.

[5][6] De Jong made her Enfusion promotional debut at Rookies on November 20, 2016, when she faced Krystina Lexova.

[9][10] In her next appearance with the promotion, at Enfusion 75 on November 17, 2018, De Jong faced Samira Kovacevic for the 61 kg Championship.

[18] Sarel De Jong would then make a defense of her 61 kg title, as she faced Madelen Søfteland at Glorious Heroes presents Enfusion Groningen on November 16, 2019.

[20] De Jong faced the WAKO welterweight world champion Mallaury Kalachnikoff in a non-title bout at Enfusion 91 on December 6, 2019.

[32] After the fight, it was revealed that De Jong had suffered an anterior cruciate ligament injury, which required surgery to heal.

[35] De Jong retired from the sport of kickboxing on October 3, 2023, citing burnout as the reason for quitting professional competition.