5 autres combattants ont été révélés :
Roy Jones
[img width=480 height=270]http://xbox360media.ign.com/xbox360/image/article/971/971581/fight-night-round-4-20090409021547319-000.jpg[/img]
Sergio Mora
[img width=480 height=270]http://xbox360media.ign.com/xbox360/image/article/971/971581/fight-night-round-4-20090409021555319-000.jpg[/img]
Kelly Pavlik
[img width=480 height=270]http://xbox360media.ign.com/xbox360/image/article/971/971581/fight-night-round-4-20090409021521867-000.jpg[/img]
Vinny Paz
[img width=480 height=270]http://xbox360media.ign.com/xbox360/image/article/971/971581/fight-night-round-4-20090409021702223-000.jpg[/img]
Jermain Taylor
[img width=480 height=270]http://xbox360media.ign.com/xbox360/image/article/971/971581/fight-night-round-4-20090409021531632-000.jpg[/img]
Il y a aussi une nouvelle vidéo faisant le comparatif avec FNR3 :
http://www.gametrailers.com/player/47831.html