Barcelona's new Brazilian midfielder Arthur said it is a privilege to sign for the LaLiga giants.
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.
Barcelona have successfully negotiated with Brazilian club Gremio to bring the transfer of midfielder Arthur forward from January.
Barcelona will not be bringing Brazilian midfielder Arthur to Camp Nou before the 2018-19 season, according to Gremio's president.
Gremio appear determined not to lose Arthur to Barcelona until their Brasileirao and Copa Libertadores campaigns end in December.
Gremio advanced to the knockout phase as Group 1 winners thanks to Wednesday's 1-0 victory over Uruguayan visitors Defensor Sporting.
Gremio and Cerro Porteno advanced from Group One with respective wins over Monagas and Defensor Sporting on Tuesday.
With Andres Iniesta leaving Barcelona at the end of the season, Arthur is sad to think he will not get to share the dressing room with him.
Millonarios were too good for Deportivo Lara in the Copa Libertadores as Ayron del Valle stole the show.