the front row, for a total of five possible attackers. The player opposite the setter in a 5–1 rotation is called the opposite hitter. In general, opposite hitters do not pass; they stand behind their teammates when the opponent is serving. The opposite hitter may be used as a third attack option (back-row attack) when the setter is in the front row: this is the normal option used to increase the attack capabilities of modern volleyball teams. Normally the opposite hitter is the most technically skilled hitter of the team. Back-row attacks generally come from the back-right position, known as zone 1, but are increasingly performed from back-centre in high-level play. The big advantage of this system is that the setter always has 3 hitters to vary sets with. If the setter does this well, the opponent's middle blocker may not have enough time to block with the outside blocker, increasing the chance for the attacking team to make a point. There is another advantage, the same as that of a 4–2 formation: as a front-row player, the setter is allowed to jump and "dump" the ball onto the opponent's side. This too can confuse the opponent's blocking players: the setter can jump and dump or can set to one of the hitters. A good setter knows this and thus won't only jump to dump or to set for a quick hit, but when setting outside as well to confuse the opponent. The 5–1 offence is actually a mix of 6–2 and 4–2: when the setter is in the front row, the offense looks like a 4–2; when the setter is in the back row, the offense looks like a 6–2. Controversies In 2017, a new volleyball players' union was formed in response to dissatisfaction with the organization and structure of professional beach volleyball tournaments. The union is named the International Beach Volleyball Players Association, and it consists of almost 100 professional players. The IBVPA claims its goal is to help athletes and provide them with the means to enjoy playing volleyball by improving the way the sport is run. Another controversy within the sport is the issue of the inclusion of transgender players. With transgender athletes such as Tiffany Abreu joining professional volleyball teams alongside other non-transgender teammates, many professionals, sports analysts, and fans of volleyball are either expressing concerns about the legitimacy and fairness of having transgender players