What are you smoking? He had?
Last season, Sane tried the kick and run against Valencia and failed badly, properly outpaced, only never to try that move against Valencia again. Clichy tried the same and looked silly doing so. Navas, after ripping Shaw apart for pace, didn't once try to go outside of Valencia.
And as for stamina - he runs up and down that pitch like a man possessed. Aurier and Valencia can easily battle it out, and Valencia may even be pushed further up the pitch, but Valencia actually seems just about as fast as at his fastest. People go on about him losing pace after the injury, but it was after the injury he made the famous run against Liverpool.
Also, I find it difficult that Aurier will downright displace Valencia following Valencia's season and Mourinho's comments on him.