NEWCASTLE, England -- Barcelona manager Hansi Flick laid down the gauntlet to Marcus Rashford on Wednesday -- and on Thursday, in stunning fashion, he responded as Barça opened their Champions League campaign with a 2-1 win at a raucous St. James' Park against Newcastle United .

Ahead of the match, Flick had urged Rashford to prove himself back in England . He did just that, scoring twice in the second half -- the first a fine header and the second and a brilliant strike from distance, which hit the underside of the bar on the way past Nick Pope .

The goals, Rashford's first for Barça since his summer move from Manchester United , earned Flick's side a vital European win in an encounter where Newcastle played their part in as well. Anthony Gordon 's 90th-minute goal set u

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