Inverurie's Hannah Miley insists her World Championship day one couldn't have gone any better after she booked her 200m medley final spot in a personal best time.

Miley touched home in a time of 2.09.46 minutes, the third quickest - to book her first ever World Championship final spot.

But with American Ariana Kukors erasing Stephanie Rice's previous world record from Beijing with a time of 2.07.03 minutes, Miley will have her work cut out to make the podium.

"It was really cool to see the world record broken in my race and to also set a new personal best is amazing," said Miley.

"I didn't really think I had broken my pb when I finished but I'm just so happy to get through, it is my first major international senior final.

"I am taking positive steps forward and gaining more and more experience and I am chuffed with it."