The 2013-14 Duke Blue Devils look very strong on paper and are considered by many to be a contender to reach the 2014 Final Four.

However, as with any team, there are potential challenges and issues that could derail Duke's hopes of capturing a fifth national championship.

Last season, Duke fans knew that if Seth Curry and Mason Plumlee both played poorly in a game, it was nearly impossible for the team to win. Next season's team will not be as dependent on two players, but there are other things to keep an eye on.

Here are the five biggest red flags on the Duke roster.

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