Verhaeren says Jack can save swim career

Swimming Australia head coach Jacco Verhaeren believes Shayna Jack can bounce back and save her career.

"Yes definitely (she can come back from this)," said Verhaeren, on arrival in Brisbane from the world swimming championships in South Korea.

"There are cases where the athlete's name is cleared, and it was all a mistake or contamination or whatever it was. And sure they come back from that."

Jack tested positive for the non-steroidal anabolic agent Ligandrol and must now state her case to ASADA.

Jack's coach Dean Boxall says he doesn't know how it happened but is standing by the 20-year-old as she tries to salvage her career.

"I stand by her," said Boxall, adding he didn't think the positive test overshadowed Australia's performance in Gwangju or affected the morale of her teammates.

"She's my swimmer and I believe in Shayna."

Boxall said he believed that the decision to withhold the information of Jack's positive test from the Australian swim team was the right one.