Braga warmed up for our Champions League meeting on Wednesday with a 3-1 away defeat to Farense in the Primeira Liga, Simon Banza getting the consolation goal.
Artur Jorge's side sit in seventh place in the table having picked up seven points from their first five games.
Union Berlin were also beaten away: 2-1 to Wolfsburg with Robin Gosens netting for our Group C opponents.
Union Berlino are currently eighth in the Bundesliga with six points from four matches.
Real Madrid are due to host Real Sociedad on Sunday evening.