Western Sydney Wanderers have added three new players to their fledgling A-League squad, including young Aston Villa reserve Reece Caira.Former Gold Coast United goalkeeper Jerrad Tyson and state premier league midfielder Jason Trifiro are the latest additions, announced by the club on Thursday.It brings to 12 the number of official signings for the new A-League franchise, who face Central Coast in their A-League debut on October 6.Coach Tony Popovic said he was pleased with the progress that's been made with the squad but admitted there was still a long way to go."(These signings are) very important," Popovic said."The three of them have earned the right to gain a contract and we're pleased to have them on board."Hopefully as we add players, the squad will work better together, understand each other better and we'll see the team improve in the way we want to play."The announcement follows the Wanderers' second pre-season win on Wednesday night, beating Blacktown Spartans 2-0.Popovic said the match proved a tough test for his young players, especially in front of a crowd of more than 4,000."The whole side was pretty much a young team, a lot of trialists, a lot of players were probably nervous in front of maybe the biggest crowd they've been in front of," Popovic said.The club has sold more than 500 memberships within the first two days of their release.