Snapped: The embarrassing moment Spurs stars squabble over who takes penalty kick
In Harry Kane's absence, both players seemed to think they were entitled to take the spot kick which could have made the score 3-0.
Son attempted to take the ball out of his team-mates hands after Dele Alli went down to win the penalty.
Eventually, Danny Rose had to split the pair up.
Lamela then took the kick, but it was saved by Claudio Bravo.
Click through the gallery above to see photos of the incident.
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