all matches. For selected matches, the broadcast production comprised up to 18 cameras, including a spidercam and a helicopter camera. In Germany the public broadcasters ARD and ZDF showed all 32 tournament games live. Across Europe, all games were available on Eurosport in 34 countries and territories. In the United States, ESPN and ESPN2 served as the official English-language broadcaster, while Univision carried coverage in Spanish. In Canada, CBC Television and Sportsnet broadcast the tournament; the event was the first in a sub-licensing partnership for FIFA tournaments between the two networks. In the United Kingdom, the games of the England national team were shown live by BBC Red Button and the BBC Sport website. The final was shown live on BBC Three. SBS held the broadcasting rights for Australia, while Al Jazeera broadcast matches in the Middle East and North Africa. The tournament was the first women's event to be the subject of a Panini sticker album, available only in Germany. The final match between Japan and the United States broke the record for most tweets per second on Twitter – 7,196. Match officials FIFA's Referees' Committee selected 16 referees to officiate at the World Cup: three from the AFC, one from the CAF, two from CONMEBOL, three from CONCACAF, one from the OFC and six from UEFA. In addition 32 assistant referees and three fourth officials were selected. The oldest referee was 42-year-old Swede Jenny Palmquist, while the youngest referee was 29-year-old Finau Vulvuli of Fiji. Squads As with the 2007 tournament, each team's squad for the 2011 Women's World Cup consisted of 21 players, two less than men's World Cup squads. Each participating national association had to confirm their final 21-player squad no later than 10 working days before the start of the tournament. Replacement of seriously injured players was permitted until 24 hours before the team in question's first World Cup game. Doping cases On 25 June 2011 the A sample of Yineth Varón, goalkeeper of Colombia, tested positive to an as yet unknown substance. She was provisionally suspended by the FIFA until the B sample result was known. On 25 August 2011, it was confirmed that she had received a two-year ban. On 7 July 2011, FIFA announced that two players from North Korea, Song Jong-Sun and Jong Pok-Sim, were provisionally suspended prior to their team's match against Colombia after failing doping tests during the tournament.