BARCELONA (Reuters) -A Fermin Lopez hat-trick and two goals from Marcus Rashford powered Barcelona to a crushing 6-1 Champions League victory over Olympiacos on Tuesday, with the Greek side left fuming over a controversial red card early in the second half.

The match got off to a flying start when Fermin opened the scoring from a rebound in the seventh minute. The 22-year-old pounced on a loose ball after Lamine Yamal's shot was parried by the Olympiacos goalkeeper.