The 20-year-old was set for another loan spell this season, but Villas-Boas may end up keeping the player after being impressed by his recent efforts.
"I couldn't be happier with Harry, so that has made us delay his (loan) move," Villas-Boas said.
"He is doing extremely well in training.
"We have a lot of interest for Harry but if the next loan move happens, we need 100 per cent certainty that he (plays regularly).
"With the way he is training he has more of a chance of playing in those teams. But he's doing enough to compete for his place here."
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