Speaking today on the Wrestling Observer Radio, Dave Meltzer reported that SummerSlam 2021 was edging closer to a complete sell-out of tickets. According to Meltzer, the estimated ticket sales for the event are somewhere between 36,000 and 37,000. This is over 85% of the event capacity for the show, which is listed as 41,661.
Tickets went on sale on June 18th however, this was after WWE’s large successes with ticket sales in SummerSlam’s presale. You can read about that here.