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Favre’s side received a boost when the champions dropped two points against Hertha Berlin in the season opener
Two early goals from England international appeared to put his side on course for an easy victory
Son's fourth goal in his last four appearances took him to 16 after winning 3-0 in the last 16 round
The match against Spurs on Wembley's hallowed turf is a homecoming for the 18-year-old England winger