You can find out an opponents game by looking at the reschudule times and if you see a gap then thats when your opponent has another game scheduled. He basically would of done that and put the game 15 mins after OP's other competitive fixture. Basically called the 'dv8r trick' as he used it a few times in the last few seasons to gain an advantage over some of his CL opponents.
*Retired From Top Eleven*