Chemistry is not important in every sport, but it is crucial in football. Football requires more teamwork than any other sport, and it is tough for a team to work together if they do not have good chemistry.
We can all point to several examples of a talented team that played down because of chemistry issues. Just look at the last season of the Jeff Fisher and Vince Young era. That team wasn't great, but they absolutely fell apart when things went south in the locker room. I am sure there are plenty of other examples you could point out.
So what say you, how important is chemistry in the sport of football?