Alexandre Lacazette scored twice to earn a shaky Arsenal victory over West Brom, their third win in a row at Emirates Stadium.

The France striker – who has scored in each of those home wins – headed into an open net in the 20th minute after West Brom goalkeeper Ben Foster tipped Alexis Sanchez’s free-kick onto the crossbar.

West Brom felt they should have been awarded a penalty before the opener when Shkodran Mustafi brought down Jay Rodriguez with a sliding challenge – but no foul was given by referee Bobby Madley.

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