‘Sky’s the limit’

World record breaker Sydney McLaughlin warned that "the sky's the limit" after smashing her 400m hurdles record on Friday, but then hinted that she could well switch disciplines.

The American clocked an astonishing 50.68 seconds for gold at Hayward Field, obliterating her own world record by more than half a second.

But questions were immediately posed about a potential switch, with McLaughlin insiting all would come down to what plan her renowned coach Bobby Kersee might hatch.

"Bobby and I have talked about possibly looking at other events but I don't know if that's going to happen."

Asked whether a switch might be to the 400m flat, McLaughlin said: "I think anything's possible... but I leave it in the hands of my coach, Bobby.

"My coach thinks there's a lot more to be done," she said. "The sky's the limit for sure."

The 22-year-old looked stunned as she hared through the line in front of a partisan, baying crowd. "I was just trying to process the lactic acid!" she said of the several moments she spent in quiet reflection in the mayhem all around her.