De Bruyne produced an assist for Sergio Aguero in victory at Bournemouth.
That was enough to take De Bruyne onto four already for the campaign - two more than any other player - and 50 in total in the Premier League in the quickest ever time of 123 games - 18 games fewer than previous record-holder Arsenal's Mesut Ozil managed.
"It's nice, I was very lucky with it to be honest," he said. "It's always nice to have something like that in the books. It doesn't really matter but maybe in 20 years back I can look back and say I accomplished something.
"This one was very lucky but they all count, it makes me happy because I tried to find my team-mates and if they score I get the assist, so it's like a co-operation, I try to provide them and they score it!"