![Gag order: Arnold doesn't want his undefeated players mentioning the word "invincible".](/web/20170208063526im_/http://www.smh.com.au/content/dam/images/g/t/1/b/d/0/image.related.wideLandscape.460x259.gu80jb.png/1486534252502.jpg)
Arnold bans players from using the word 'invincible'
In just three months, Sydney FC coach Graham Arnold has gone from spruiking his desire for his team to become the A-League's first "invincibles" to telling his players to stop stop talking about it.