Six members of the delegation tested positive Monday, increasing the total to 10 since last week and forcing the club to cancel Tuesday’s flight to Washington. Puebla had previously called off a preseason friendly against Mexican counterpart Toluca over the weekend.
The withdrawal leaves D.C. United, Alajuelense (Costa Rica) and Alianza (El Salvador) in the inaugural competition, which is being held during United’s two-week break from MLS regular season matches.
Three doubleheaders have been reduced to single matches: United vs. Alajuelense on Wednesday (8 p.m.), United vs. Alianza on Sunday (5:30 p.m.) and Alajuelense vs. Alianza on July 14 (8 p.