Sentencing, Judge Norman Wright told the pair: "This was a flagrant abuse of power and a gross breach of trust."
He added: "The room has been described as a cell but it seems to me it was akin to a prison cell from a third world country, not the home of an 11- or 12-year-old living in this century in this country."
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The boxer said it was the "least he could do" and even donated the £30,000 shorts he wore in his last fight against Devon Alexander.
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Wayne Rooney admitted there was a touch of Paul Scholes about his performance as he ran midfield in Man United's easy win over Newcastle.