Updated: August 17, 2016

Sunette Viljoen wasted no time in booking her place among the medal contenders at the Rio Olympics, delivering a 63.54m heave with her first attempt on Tuesday night (local time) to secure her spot in the women’s javelin throw final.

“I felt so relaxed… my throw was very nice and when I saw the javelin I knew it came out well, and then I saw the distance and I was very happy with that,” she said.

Viljoen, who was fourth in her specialist event at the 2012 London Games, was set to compete in the final on Thursday night.

The rest of the SA contingent in action on day five of the athletics competition were unable to progress beyond preliminary rounds.

LJ van Zyl took fifth place in his 400m hurdles semifinal in 49.00 and Wenda Nel was sixth in the same discipline in 55.83, and they were both knocked out of the competition.

Fellow hurdler Antonio Alkana was seventh in his semifinal over the 110m distance in 13.55 and long jumper Lynique Prinsloo was unable to leap beyond 6.10m in the women’s long jump qualifiers, as they too were eliminated.