If D.C. United are going to be one of the rare MLS teams that survive being paired with a Liga MX club, they're probably going to have to get past the increasingly common 4231 formation. Good teams using a 4231 troubled United somewhat regularly last year, especially once Davy Arnaud became unavailable due to concussion. Queretaro isn't locked into the formation by any means - Victor Manuel Vucetich won the CONCACAF Champions League playing a 442, and tried a 4321 against Tigres last Friday - but the most likely lineup for los Gallos Blancos tomorrow night is as follows:
Goalkeeper Tiago Volpi is arguably Queretaro's biggest weakness.