Manchester United will be without Paul Pogba for the visit of Liverpool on Sunday, while David de Gea will be assessed.
Gremio had hoped to hold on to Arthur until the end of the year, but the midfielder has completed his long-awaited move to Barcelona.
Argentina will make a decision over the future of Jorge Sampaoli at the end of July after the coach takes charge of the Under-20 side.
Spain has a full-time successor to Julen Lopetegui, as former Barcelona coach Luis Enrique secures a return to football.
Former Arsenal midfielder Jack Wilshere is staying in the Premier League after signing with London rivals West Ham.
Wales will be coached by Wayne Pivac when Warren Gatland's lengthy tenure ends after next year's Rugby World Cup.
Spain have a full-time successor to Julen Lopetegui, as former Barcelona coach Luis Enrique secures a return to football.