Leeds reported today that they have 650 tickets remaining on sale of their 3,334 allocation, which fans have until 2pm on Tuesday to buy.
It's set to be the third game of the season with an attendance of over 20,000 at the KC Stadium, the last one being the 4-1 win against Cardiff watched by 23,089.
Tuesday's a big night of Championship football away from the KC Stadium as well. Barnsley and QPR, currently just a point either side of the relegation zone, meet at Oakwell. Meanwhile, 16th-placed Coventry, 3 points ahead of Hull City, host Luton.