 Complete the following phrase:  F.C. United hosted a test event on 16 May 2015, staging a short match between their first team and an Invitational XI made up of past players. This event was organized to test the facilities and prove that the stadium can hold a large capacity crowd, and took place with 3,241 supporters in attendance. The official opening game was a friendly between F.C. United of Manchester and Benfica B on 29 May, the anniversary of Manchester Uniteds victory over Benfica in the 