Estonia's Eneli Jefimova set a new championship record in the women's 100m breaststroke at the World Aquatics Junior Swimming Championships in Netanya, Israel.
With a time of 1 minute 6.23 seconds, the Estonian earned her place in the final as the quickest semi-finalist.
Earlier on Wednesday, Jefimova swam a time of 1 minute 7.37 seconds in the preliminaries, which, according to the information published at that time, was a new world junior championship record. However, it later emerged that the record was still held by Ruta Meilutyte of Lithuania, who swam 1 minute 6.61 seconds in 2013.
Undeterred, 16-year-old Jefimova claimed the record at the very next opportunity, swimming 1 minute 6.23 seconds in the semi-final, just five hundredths of a second slower her Estonian national record.
The Estonian qualified comfortably for the final, almost a second and a half ahead of France's Alexanne Lepagein in second place. Lepage ended with a time of 1 minute 7.60 seconds followed by Francesca Zucca of Italy in 1 minute 7.68.
The final of the women's 100m breaststroke at the World Aquatics Junior Swimming Championships takes place on Thursday at 6.28 p.m. Estonian time.
Editor: Michael Cole