After putting on an impressive road showing at Crew Stadium, the New England Revolution carry four away goals into the second leg of their MLS Eastern Conference semifinal with Columbus. 

Jay Heaps' side put together one of the most complete performances of the season in the first leg, but now the Crew have to finish the job at Gillette Stadium on Sunday.  The Crew's task may seem impossible, but they still have hope after scoring twice at home in the first leg.

Here's a look at the key issues that will shape Sunday's second leg in Massachusetts. 

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