Haaland his goal in victory over RB Leipzig was his 40th in 35 games - a new record for the competition.
"Do I have to answer questions about him again?" asked Guardiola with a laugh.
"For the 117th time I am really impressed. The players won, and Haaland got a new record, with which we wish him congratulations.
"He is a fantastic player who we are really, really happy with. We love him, and it's not just because of the goals, but because of many, many other things."