Derby County have signed Matej Vydra from Watford for an undisclosed fee.
Watford have confirmed the sale of Matej Vydra to Derby County following a 3-1 loss at home to Arsenal in the Premier League on Saturday.
Czech international Vydra was a key member of the team that saw Watford earn promotion to the top flight in 2014-15.
But he spent last season on loan in the Championship with Reading and will now return to the second tier with Derby, signing a four-year contract for an undisclosed fee.
Santi Cazorla's penalty, together with goals from Alexis Sanchez and Mesut Ozil, saw the Gunners record a simple win, Roberto Pereyra netting a consolation for Watford in the second half.