How are Sunderland coping with financial restrictions?

"It would be prudent to sell someone at a big profit," believes The Athletic's football finance writer Chris Weatherspoon, as Sunderland look to stay on the right side of PSR (Profit and Sustainability Rules) and SCR (Squad-Cost Ratio) in their second season since promotion to the top flight. The timing of a sale doesn't really matter, it is the length of the contract that means something.