The tough clash between the English and Portuguese sides saw Forest win through two spot kicks, the first coming from a handball incident involving Porto defender Bednarek.
Pep Guardiola’s side will look to bounce back when they face League One side Leyton Orient in the FA Cup fourth round on Saturday.
Vieira, 22, contributed to FC Porto’s title victory last season, netting six goals and 14 assists in 27 Primeira Liga appearances.
The six-goal thriller saw Salah and Brazilian star Firmino net a brace while Mane scored one goal.
Atletico Madrid drew 0-0 at home to FC Porto in a cagey opening UEFA Champions League Group B game on Wednesday.
Mr Mourhino considers national team role as only befitting the twilight of this campaign
The first legs of this season’s quarter-final clashes will take place on April 6 and 7, with the return dates being staged a week later.
