In February 1998, Daisy Lang won the vacant WIBF European Bantamweight title in ten rounds against Krisztina Horvai.

[3] After winning another fight by knockout in round 2, she defended her European championship belt against Anastasia Toktaulova on 27 March 1999.

On 17 July of the same year, Lang became world champion with a victory against Gizella Papp in the battle for the vacant WIBF Super Flyweight title.

[3] From 1999 to 2002 Daisy Lang successfully defended her title against Sonia Pereira, Kathy Williams, Oana Jurma, Brenda Burnside, Nadia Debras, Michelle Sutcliffe and Réka Krempf.

On 18 January 2003 Lang drew against Silke Weickenmeier in fight for the GBU Super bantamweight title, but won the rematch on 10 May with a majority decision in ten rounds.