The 23-year-old creative midfielder has been a sensation since he was snapped up from Slavia Prague last summer for only €3m.
"It was an enormous surprise for us that he had such a strong impact in Serie A, but Tony always gives his best and works hard in training," agent David Nehoda told FCInterNews.it.
“I think he'll remain at Udinese at least until June, but then anything can happen in football. He can also improve further in Udine, as this is a great team for young players to thrive in."
“There are currently no formal offers, so we have no preference. In my view, Tony is ready for the next step, but he'll have to also prove his quality in the second half of the season. That is the most important thing."