The only one out of those who is quick is Jesus. I don't have access to speed tests other than what I see out on the pitch. I don't know what position Sanchez plays now. He is a very talented player who unlike a purely quick winger like White has the ability to play inside, and that's what he seems to be doing: morphing into a midfielder from the forward he used to be. But we don't need either. We've improved as a team, because we don't have weak links in defence like we used to last season, and Jesus, and Sane have hit the ground running. I am sure time working on the training ground with Guardiola and gelling as a unit works as well. Sanchez decline this season is not due to Wenger, or the players he's with. They are common factors this season and last, its because one of the basic parts of his game, his speed is fading. I keep repeating it, but it doesn't make it any less true. No I can't quantify or prove it, other than by reference to the hundreds of videos of his game that are out there. You compare the dashing forward of Udinese who moved to Barcelona, and the pussy cat we played last weekend. Seems obvious to me. You're all over the place to be frank.