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Sheffield United signed Mark Duffy on a free transfer in the summer of 2016 just months after Chris Wilder had been appointed as their new manager, and it has proved to be a masterstroke addition.

The Liverpool-born attacker left Birmingham City for Bramall Lane following the expiry of his contract, and has been something of a regular in the Blades' starting XI ever since, scoring 11 goals and providing a further 21 assists in 94 appearances in all competitions for the Yorkshire outfit.

Even though the 33-year-old primarily played on the wing during the earlier years of his career, he has been utilised as the individual that plays behind the strikers in Wilder's preferred 3-4-1-2 formation in recent times, and he has excelled.

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Not only did he provide all three of the assists in his side's 3-2 win against Millwall at The Den at the end of last month, but he also starred in the 1-0 victory against Hull City at Bramall Lane on Saturday as the club went to the summit of the Championship table.

Even though he didn't score or assist and was not on the pitch when David McGoldrick scored the decisive goal from the penalty spot, he was still one of their biggest threats in terms of all-round attacking play.

Duffy looks to be one of the first names on Wilder's team-sheet right now – and he will need to keep his form up following the return of Paul Coutts from injury – so we want Blades supporters to vote on our poll to tell us whether they think the 33-year-old is their most important player, or not.