Juventus head coach Massimiliano Allegri acknowledged Inter caused the Serie A leaders problems despite the Nerazzurri going down 1-0 in Friday's Derby d'Italia.
A second-half header from Mario Mandzukic earned a narrow victory at Allianz Stadium, ensuring Juve levelled the record for the most points collected, 43, after 15 games of a season in Europe's top-five leagues.
Inter started well and had the better chances in the first half, with Roberto Gagliardini hitting the post with a shot that had Juventus goalkeeper Wojciech Szczesny beaten.
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But Mandzukic came up trumps with a header from Joao Cancelo's left-wing cross to put Juve in an even more dominant position at the top of the Serie A table, despite Allegri accepting his side had to battle.