Drake courted controversy at his Saturday night concert by taking a lyrical jab at Kanye West in the rapper's hometown Chicago, Illinois.

The Canadian superstar was performing his track "Know Yourself" onstage at The United Center when he made a subtle change to one word in the song - but the switch didn't go unnoticed by fans.

In the original 2015 track, Drake rapped, "Had a job sellin' Girbaud jeans/I had a yellow TechnoMarine/Then Kanye dropped, it was polos and backpacks."

Drake has yet to explain the reason for his line change, but he recently became engaged in a lyrical feud with Kanye's close pal and collaborator Pusha T, who outed the "God's Plan" hitmaker for having a secret son with former porn star Sophie Brussaux on his diss track "The Story Of Adidon."

Drake was subsequently forced to address the claims on his new album Scorpion, confirming he is a dad on a song called "Emotionless."