The pair have a bitter history after Keane broke Haaland Snr's leg when playing for Manchester United against City.
Alf-Inge Haaland said: "When you have the background of Keane and other experts, who may have a slightly different agenda.
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"They probably think it's a bit okay to come up with that (the criticism).
"But the team wins, and Erling is still top scorer, so it can't have been that bad."