Jarmillia Murphy-Knight, who made her international debut, has made the semi-finals of the 400m after finishing the race strong.

The 18-year-old finished fourth with a personal best of 59.19 seconds and qualified as one of the six fastest non-automatic qualifiers.

Another debutant and teammate Annamaria Leszczynska was unable to hold her pace down the final 100m and finished sixth in her heat in a solid 59.94, missing out on a place in the semis.

Australian running rising star Riley Day started her Championships in fine form for the 100m with a time of 11.77 seconds to automatically qualify for the semi-finals later this afternoon.

Mia Gross placed fifth in her heat with a time of 11.80 seconds and had a nervous wait to see if she was one of the four fastest non-automatic qualifiers.

Unfortunately, she was knocked out in the final heat to miss by one spot, and just 0.03 seconds.

In the women’s 3000m Australians Amelia Mazza-Downie and Lara Crouch finished in the top 10.

Crouch and Mazza-Downie were part of the main pack with eventual gold and silver medalist Japanese duo Nozomi Tanaka and Yuna Wada.

Mazza-Downie finished in sixth place (9:09.19) while Crouch was tenth (9:16.28) as they both ran personal best.

Also on the track was Ella Connolly, who took the win in semi-final three of the 400m, in a season’s best 52.78 seconds and pipped Kenyan Mary Moraa on the line by 0.2 seconds.

Connolly built on her heat performance from yesterday, which was a season’s best of 52.99s. 

“Making the final was my main goal so I'm absolutely ecstatic!” Connolly told Athletics Australia. 

“There's a lot of 52-second runners so I just need to stay relaxed. 

"Everyone wants to compete in the world junior final. I'm just going to give it my all,” she said.

Carley Thomas is through to the final of the 800m after a commanding performance in her semi-final.

The 17 years old crossed the line in first place and in a new personal best 2:03.19.

“I just wanted to go with whatever moves people made," she said

“I was trying to look in my peripheral vision to see if anyone was coming up and I thought it’s now or never,” said Thomas.

She will go into the final as the fourth-fastest qualifier.

Teammate Jemima Russell had a lifetime best of 2.04.81 to finish fifth in the second semi but it wasn’t enough to progress