The Spanish boss heaped praise on his new signing after taking down Burnley in the Carabao Cup
Pep Guardiola says that he believes Ruben Dias can be a key figure for Manchester City for "six or seven years" after sealing a deal for the Portuguese defender.
Manchester City completed a £62 million ($79m) move for the defender on Tuesday, with Dias signing a six-year deal with Guardiola's side.
Part of that cost was offset by a move for Nicolas Otamendi, who completed a move in the opposite direction to Benfica in a deal worth £14m ($17m).