Watford striker Odion Ighalo made Real Madrid's win at Granada yesterday.
The Pozzo family own both Watford and Granada CF.
The Daily Mail says Ighalo was presented on the pitch at the Los Carmenes stadium ahead of kick-off prior to their 2-1 La Liga defeat by Real.
The 26-year-old's appearance was greeted with a rousing reception from the home supporters - who still remains a clear fan favourite despite his departure.
Ighalo was given this season's Granada home shirt with his name and the No 7 on the back as a gift from the Spanish club who recognised his feats in their rise to Spain's top flight.