Cate Campbell puts down marker with Australian 100m freestyle title

Cate Campbell hasn't really enjoyed winning another Australian swimming title.

Campbell admits she's still doesn't know exactly where she's at after collecting the women's 100m freestyle crown in Adelaide on Sunday.

On the opening night of the nationals, Campbell's triumph was followed by Kyle Chalmers becoming a national champion in the 100m butterfly, rather than his specialist stroke, freestyle.

"It's a bit of fun," Chalmers said. "There's no real pressure on me, I came in and did my thing."