Ryan Giggs, who is filling in as manager of Manchester United, one of the world's most valuable and most popular soccer clubs. He's vowing to make fans proud of the team again. Alex Livesey/Getty Images hide caption

itoggle caption Alex Livesey/Getty Images

Manchester United manager Alex Ferguson (left) and Everton manager David Moyes (right) during a match in April 2012. Moyes will succeed the retiring Ferguson at Man United. Peter Powell /EPA /LANDOV hide caption

itoggle caption Peter Powell /EPA /LANDOV