Dias' comfort on the ball and tactical awareness have been key for Man City.
Guardiola is convinced the Portugal international, who sealed a summer move from Benfica, will go on and produce ‘big moments’ for the Cityzens.
Pep Guardiola heaped praise on central defender Ruben Dias for the impact he has had on Manchester City's defensive showings this season.
The central defender has been impressive for City since he arrived from Benfica in September and was vital in Saturday’s 1-0 win over Southampton at the St Mary's Stadium.
City have now registered seven clean sheets from their last eight games, and Guardiola maintains that Dias has been key in achieving that stat.
“Ruben has helped us a lot to be solid, and he has settled perfect with John (Stones)," Guardiola said as Mancity.com reported
“It’s incredible - that is how we can still be there. Knocking on the door of teams above us. We need it to be stable and maybe one day players will be fresh to score the goals.
“Ruben doesn’t make a single mistake and he is always focused.
“He is able to lead the line, the same with John. Our club bought an exceptional defender - especially for the personality.”
When asked if he can see some similarities between Dias and Man City legend Vincent Kompany, Guardiola replied: “No, it takes time and Vincent is irreplaceable. He had ten years here and Vincent, when I met him, was 30, 31 - Ruben is 23.
“But what is important when you buy a player is that you have a feeling they will be settled for the next years.
“And we are pretty sure Ruben will give us big moments.”