I can't figure out if the computer A.I. is substituting for my players in matches, or if there's even something I can do to force subs. I'm new ... had two matches so far ... in both, one of my starters got tired, and the commentary said this led to an opposition goal. I suppose I could just not start the guy until he's fit, but in the meantime, will the A.I. sub for him when he's knackered?