The Cottagers heaped more pressure on Spurs and manager Thomas Frank with a 2-1 win a Tottenham Hotspur stadium last night.
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At the final whistle, Porro was seen shouting at Bergvall as he sought to applaud home fans before the fullback stormed down the players' tunnel.
Asked about the incident, Frank remarked: "I didn't see the incident so I don't know exactly.
“We are in a tough spell right now and for my players it is about being as calm as possible and doing everything we can to work through it."