Manchester City may be willing to sell Gray if Sunderland shows a strong interest in signing him. This is because Borussia Dortmund is expected to pay £25m for Bellingham, and a part of this fee might be used to buy Gray from Manchester City.

Meanwhile, Sunderland is also in talks with another player, Chris Rigg, who is being courted by other Premier League teams. Rigg is considering a new deal with Sunderland, but it remains to be seen how his negotiations will unfold.

It's worth noting that no official decision has been made regarding Gray's potential transfer to Sunderland. However, the interest from Sunderland and Borussia Dortmund could impact Manchester City's decision to keep or sell the young player.