Why Chelsea's Christian Pulisic played at wingback vs. Arsenal: Thomas Tuchel explains

The American star played in a different position in a preseason match against London rivals Arsenal on Sunday

source https://www.sportingnews.com/us/soccer/news/christian-pulisic-chelsea-wingback-arsenal-thomas-tuchel/v83nwq6lz7531x7br6l94kvzd