Players from both Jacksonville Jaguars and the Baltimore Ravens dropped to their knees as the national anthem was played prior to the match in London.
Now similar protests have erupted across the US with at least 100 players either kneeling or sitting during the national anthem.
No players were kneeling during the playing of ‘God Save The Queen’ at Wembley, which followed the Star Spangled Banner.
At a rally on Friday night the president said: ‘Wouldn’t you love to see one of these NFL owners, when somebody disrespects our flag, to say, ‘Get that son of a bi*ch off the field right now… he is fired.’
Players from both Jacksonville Jaguars and the Baltimore Ravens defied him on Sunday by dropping to their knees as the national anthem was played prior to the match in London, and other players in the US have taken the same route by either kneeling or sitting, locking arms in solidarity, or staying in their locker rooms during the national anthem.
It went from just 10 players kneeling during national anthem to 200 players kneeling or locking arms after in solidarity Trump asked for the firing of NFL players for protesting.