If Walker were to leave, would anyone be tempted by Reece James?
I know his injury record is horrific, so it would be a massive gamble. But when fit, he's one of the best in the world already and still young.
The only reason I think it's even remotely possible is that Gusto has been excellent for Chelsea this season in James' absence, and if they need pure cash profit they may decide it's better to sell an injury prone James than someone like Gallagher. We've done a lot of business with them recently, so there's clearly a good relationship between the top brass.
There's a real lack of quality right back options out there. Frimpong, Couto, etc. are practically wingers. Others are either midfielders or centre backs who are filling in. Pep clearly likes the option of a 'traditional' full back that Walker offers tactically.
James is probably the closest thing to Walker out there, but he's far better offensively. The injuries are a huge problem though, especially for such an explosive runner.
I don't see it happening this summer, but if he stays fit next season and Chelsea's financial situation is perilous, it might be worth a punt.