The Olympic medallist is said to have arrived late for rehearsals on a number of occasions, which has led to professional partner Flavia Cacace questioning his commitment.
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"His partner Flavia has been sweating blood to make sure they get to the final and it sometimes feels Louis doesn't have the same determination," a source told The Sun.
Smith has also compared rehearsing for the show to a recent dream about being in prison.
He tweeted: "The last time I didn't want to be somewhere so bad as this I was dreaming I was in prison."
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Lous Smith was forced to miss Strictly rehearsals in early November due to an illness.
The gymnast was previously rapped by producers after accidentally tweeting a spoiler about Sid Owen's exit from the competition.
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