Domingos Quina joined Watford in a deadline day move from West Ham United in August 2018.
The Portuguese youngster agreed a four-year contract, while Watford also hold the option on an additional 12 months for the talented Under-20 international.
His first season with the Golden Boys saw Quina make his Premier League debut, score his first Premier League goal and make 13 appearances for the club.
Born in Guinea-Bissau, Quina spent time in the youth setups at both Benfica and Chelsea before moving to east London in May 2016.
He made his professional debut at the start of 2016/17, featuring twice in the Hammers’ Europa League campaign, and the bright young prospect played a starring role as Portugal were crowned champions in the 2018 Under-19 European Championships.