The matchups for each day of the tournament are announced a day in advance. They are determined by the sumo elders who are members of the judging division of the Sumo Association . As many more wrestlers are in each division than matchups during the tournament, each wrestler only competes against a selection of opponents from the same division, though small overlaps can occur between two divisions. With the exception of the san'yaku -ranked wrestlers, the first bouts tend to be between wrestlers who are within a few ranks of each other. Afterwards, the selection of opponents takes into account a wrestler's prior performance. For example, in the lower divisions, wrestlers with the same record in a tournament are generally matched up with each other and the last matchups often involve undefeated wrestlers competing against each other, even if they are from opposite ends of the division. In the top division, in the last few days, wrestlers with exceptional records often have matches against much more highly ranked opponents, including san'yaku wrestlers, especially if they are still in the running for the top division championship. Similarly, more highly ranked wrestlers with very poor records may find themselves fighting wrestlers much further down the division. For the yokozuna and ōzeki , the first week and a half of the tournament tends to be taken up with bouts against the top maegashira , komusubi , and sekiwake , with the bouts within these ranks being concentrated into the last five days or so of the tournament (depending on the number of top-ranked wrestlers competing). Traditionally, on the final day, the last three bouts of the tournament are between the top six ranked wrestlers, with the top two competing in the final matchup, unless injuries during the tournament prevent this.