Durant and Drake were once the epitome of cross-field friendship: They appeared at concerts together, swapped jerseys, and Drake even mentioned Durant in several of his hit songs. However, signs of a rift began to emerge earlier this season, when Durant failed to show up to Drake’s new album release party in Toronto — an event he never missed.

A source close to the pair revealed:

“They had a big argument in June. It was both personal and business. They’re both very strong personalities, and this time they couldn’t find common ground.”

Fans quickly noticed on social media that KD had stopped following Drake on Instagram, while Drake stopped liking Durant’s posts. This sparked speculation that their “brotherly” relationship was officially over.

Some music industry sources say the conflict may be related to Drake’s partnership with a rival sports brand of Durant’s personal sponsor. However, eagle-eyed fans also discovered that Drake neglected to wish Durant a happy birthday in September, adding to the drama.

Although neither side has officially spoken out, the online community has been divided in the debate. Durant’s fans believe that the NBA star should focus on his basketball career, while Drake’s fans believe that the rapper is “too busy with music” to maintain their friendship.

If this is indeed the end of their relationship, it will be a sad end to a friendship that was once considered a “legend” between sports and music.