Chief Football Writers Need to Learn the Rules

It was interesting to read the Telegraph's chief football writer Sam Wallace claiming that Tottenham Hotspur's second goal in the North London derby on Saturday 5th March 2016 developed from an offside incident that was never picked up by the match officials.

Wallace is wrong, as shown by this screen shot.

 Arsenal defender (red) is clearly keeping Dele Alli (white) onside, which led to 

Harry Kane's sensational goal to make it 2-1

From the Telegraph article

62mins

Kane fires hosts ahead

What a finish. Harry Kane, that is magnificent. He bends in a 25-yard shot from wide of the box all the way around the goal and over Ospina. Absolutely incredible finish - he'll never finish one better. Luckily for Arsene Wenger, Dele Alli was offside in the build-up so he can blame that after the game, rather than his team going into meltdown. Again.