The Norwegian joins Kevin De Bruyne, Ruben Dias, Bernardo and Rodri as one of the nominated players to take the armband as and when required.
And Haaland started his skipper career perfectly with an assist in the 4-0 win over Newcastle.
“When Kyle left, Kevin became the first [in line] and I nominated Erling to be a captain,” said the boss.
“When a player will be 10 years here, sooner or later you take on that responsibility.
“It’s nice that it’s the first time in the Premier League that it happened.”
Our No.9 appeared to hurt his knee towards the end of the win over the Magpies, but Guardiola is hopeful he will be fine for Wednesday’s game against Real Madrid.
“When he was down everyone was scared, but he got up and was smiling like always,” said Pep.
“I didn’t speak with him or the doctors. The doctors didn’t come with bad news so hopefully he will be fine.”