West Ham players took the knee in solidarity with Frank Nouble moments before kick-off against Culture by Mo Ali FC following alleged racial abuse.
The Irons' clash with Dallas United on Thursday was suspended after a player from the American outfit allegedly called Nouble the n-word, sparking a furious reaction from fellow West Ham veteran Ferdinand and marring the inaugural event in North Carolina.
Footage surfaced on social media of the ex-Hammers, QPR and Sunderland defender appearing visibly irate and telling one opponent: 'Why are you looking at me for?