Arsenal 3-0 Stoke: Joey Barton on what sets Alexis Sanchez apart

Arsenal up to fifth with win
Koscielny headed early opener
Sanchez goals take season total to 18
Debuchy dislocates shoulder in first half
Alexis Sanchez scored twice as Arsenal climbed above neighbours Tottenham and into fifth place in the Premier League with a dominant display against Stoke.
Laurent Koscielny took advantage of slack marking to head the hosts into an early lead from Sanchez’s cross.
The Chile international then finished off a neat move with Tomas Rosicky to double Arsenal’s lead before half-time.
Sanchez, 26, added his second goal of the game and 18th of the season from a free-kick shortly after the break.
It proved a relatively routine victory for an Arsenal side and for David Ospina, who retained his place after the 2-0 FA Cup third round win over Hull.