Boss Gareth Southgate insists everyone at Middlesbrough owes Bryan Robson a debt of gratitude - but concedes his departure from Sheffield United has increased the chances of an FA Cup upset on Sunday.And the former England defender admits he is disappointed at the way Robson´s latest management role at Bramall Lane ended, especially as it is likely to give the home fans a boost when Boro travel to South Yorkshire."It probably doesn´t make our job any easier because, as we know, the supporters at Sheffield United were a bit anti-Bryan and with the new man (Kevin Blackwell) going in, they will presumably have a new lease of life, however temporary," he said.
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