Arsenal: Unai Emery has improved Gunners, says Hartson
Eric Dier's goal sparked an angry reaction from Arsenal fans (Image: GETTY)
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Meanwhile, BBC Sport man Phil McNulty believes Dier's antics have led to the north London derby truly taking off.
"Arsenal manager Unai Emery gestures towards the floor with the palms of his hands calling for calm as there is an air of anger and injustice among the crowd and his players," he said.
Eric Dier's taunting of the Arsenal fans after his goal raised the temperature.
"And they clearly feel there was little contact as Son went down under challenge from Holding that resulted in Harry Kane's penalty.