Karnezis was caught between Napoli and Watford for the next season. The Greek international turned 32 in July and was under contract with Udinese until June 2019. However, with Alex Meret returning from his loan at Spal and Simone Scuffet also on the books, the Friulani have no shortage of talented goalkeepers. According to sources, Karnezis would join Napoli and replace the increasingly shaky Pepe Reina, or even act as his understudy. He instead joined Marco Silva's Watford, to meet another former Greek international José Holebas. As a result of this possibility, since 14 May, Udinese's coach Luigi Delneri decided to start Simone Scuffet for the remaining matches of the season.