The Reds have been heavily linked with a swoop for the highly-rated 20-year-old, who left Anfield for just £250,000 in August 2011.
But Appleton says the Merseysiders are yet to come back with an improved offer for the England Under-21 international, who has netted 13 goals in the Championship this term.
“We have not heard anything since an initial Liverpool approach a couple of weeks ago,” said Appleton.
“As far as I am aware Thomas will have a day off tomorrow like everyone else and come back to prepare for the next game with us.”
Meanwhile, Liverpool are expected to complete the £12m signing of striker Daniel Sturridge from Chelsea in the coming days.
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