Sema joined Udinese over summer on a season-long loan - in search of regular first team football.
The Sweden international moved to the Hornets in the summer of 2018 from Ostersunds FK on the back of their exciting run in the Europa League the previous season.
Sema, 26, did enjoy a decent campaign with Watford last term, making over 15 appearances. But he admits he needed to be playing more and so chose to make the switch to Udine.
"First and foremost it was about playing time," he told the Göteborgs-Posten.
"I felt that I had been there for a year, got to know the Premier League, started pretty much considering it was my first season after I came from the Allsvenskan, got to score ... Now I wanted more, I wanted to play more."
Sema added: "It has felt good. I got into it well and got to play - which is important - and I've developed."
- updated October 14