The 18-year-old Aucklander Orinoco Faamausili Banse has qualified fastest in the 50-metres freestyle on the second morning of the New Zealand Open Swim Championships in Christchurch.
The Beijing Olympic relay swimmer and national title holder clocked 22.69 seconds in his heat, 4/10ths of a second from the qualifying mark for the world championships.
West Auckland's Michael Jack threw down the challenge to top qualifiers in the 400 freestyle in 3:57.21 while Wellington's Samantha Lucie-Smith, 16, was fastest in the women.
Top qualifiers in the 200 breaststroke were Southland's Natalie Wiegersma and Dunedin's Matthew Glassford ahead of world championship qualifier Glenn Snyder.
The finals start at 6pm and the championships run until Sunday.