Kieran Tierney blasted home a winner for Arsenal to seal the top spot in its group and advance to the round of 16 of the Europa League with a 1-0 victory over Zurich on Thursday. The Premier League leader needed a win in London to guarantee first place ahead of PSV Eindhoven. Tierney unleashed a fierce half-volley from the edge of the area in the 17th minute that left Zurich