Match gallery: Crewe 5 Chesterfield 1
Porter spent a month at the club back in 2013, but failed to score in four appearances.
But he showed the visitors’ fans what he is truly made of with a brace to send the sorry Spireites spiralling to their first defeat against Crewe since 2011 in a one-sided thrashing.
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Hide AdThe Railwaymen’s other goals came from Perry Ng, George Cooper and Callum Ainley to send Chesterfield crashing off the tracks - with their winless run on the road extending to nine games in the process.
The visitors got a mere consolation through Eddie Nolan’s own goal.