Major U.S. soccer event sees first controversy after teammate's alleged racial slur

Dallas United withdrew from The Soccer Tournament after allegedly using a racial slur towards an opponent.
The slur was reportedly directed at West Ham United's Frank Nouble by a Dallas United player.
West Ham United walked off the field in protest and the match was abandoned.
Officials investigated and expelled Dallas United from the tournament, which has a $1 million prize.
The incident comes as racism in soccer remains an ongoing issue.