Sullivan wrote in the London Evening Standard: "It was a truly memorable afternoon for West Ham at White Hart Lane yesterday and I want to personally thank our fans for the important role they played in it.
"While Sam Allardyce’s tactics and the players will rightly be praised for an absolutely outstanding 3-0 win at our local rivals, our fans made sure that today’s headlines were all about football rather than events in the stands.
"Yesterday morning, I wrote an open letter to supporters attending the game to remind them they would be acting as ambassadors for our club. As expected, they did not let us down."
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