When I was a kid my club had a very good policy with regards to knockout comps. Player 1 has the responsibility to contact player 2 offering 3 different times that he is available to play. By different they do not mean Tuesday, Wednesday or Thursday at 8am. By different they expect you to be able to offer a weekday time during the day or evening and at a weekend, or at least be able to offer 2 of those times. If player 1 or player 2 is not being reasonable then you can request the committee to intervene and either force the game to be played or disqualify one of the players. Everyone knew this and in 8 years of playing there I never had, or knew of anyone that went to the committee for a decision. I saw players actually concede the match, as they didn't want to be that person that makes the committee get involved.