Red Star Belgrade, who won Europe's premier club competition in 1991, engineered a 2-0 home victory against HJK Helsinki thanks to a Richmond Boakye header and substitute Milan Pavkov's sweeping 90th-minute finish.
A round-up of Saturday's qualifying matches for the Euro 2020 Finals.
On a night of close finishes in all five first-leg playoff games, the 21-year-old Dutch winger opened his United account with a memorable performance in the famous number seven shirt previously worn by George Best, Eric Cantona and David Beckham.
A Neymar double and a clinical finish from Luis Suarez handed Barcelona a comfortable 3-0 victory over BATE Borisov that put them on the verge of qualifying for the last 16 of the Champions League for the 12th consecutive season.