The 22-year-old scooped bronze in the lightweight women's single sculls at her first ever World Championships.
Grant, who is studying medicine at Trinity College, Cambridge, attributed her success to the efforts of her opponents, knowing she had to ward against complacency to finish on the podium.
"[I don't remember] much of the race to be honest," said Grant.
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"I had a really strong fast start to make sure that I was in the mix and I definitely that. After that point it was about battling and seeing what I could do in the second half.
My competitors are all so fantastic and there's no room for errors, so I am just really happy to come away with a medal.
The podium place marks an incredible year for the Cambridge rower after making her World Cup debut and becoming the U23 World Champion in 2018.
Elsewhere, Laurence Whiteley missed out on a medal in the PR2 men's single sculls finishing behind Netherlands, Canada and Italy.
Meanwhile, Gemma Hall, Fran Rawlins, Ellie Lewis and Maddie Arlett finished in fifth place in the lightweight women's quadruple sculls.
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