This is not an article about David De Gea being rubbish. He is widely regarded as the best goalkeeper in the Premier League, if not the world, and with good reason.
But he should not be put into a combined Manchester XI.
Combined XIs are a funny thing. They are generally a bit of fun, concocted by fans and pundits ahead of the biggest games on the football calendar. With the Manchester derby coming up, you will see dozens of these XIs all over social media and will be able to pick your own on various websites.