Vydra is being linked with Arsenal and Tottenham after a superb season with the Hornets.
"So far he has scored 22 goals and was voted the best player in the Championship," agent Ondrej Chovanec told Tuttoudinese.it.
"He showed what he can do and is a great player. He is still under contract with Udinese for another two years.
"I have an excellent rapport with the Pozzo family. We met in March and agreed to make any decision after the end of the season.