Many Arsenal fans have now all noticed something funny about the referee who will take charge of their clash with Porto this evening. Clement Turpin will be the man in the middle when Arsenal host Porto at the Emirates Stadium on Tuesday evening. This is a huge fixture for the Gunners. The Portuguese outfit are heading into the second-leg of this Champions League round of 16 encounter with a 1-0 advantage on aggregate, after they snatched a late winner in the first-leg match at the Estadio do Dragao. Arsenal will have to overcome this deficit and turn the tie around if they are to progress to …