Are Calvin Harris and Taylor Swift still feuding after their split? Harris appeared to throw shade at his ex right before the release of her new song, "Look What You Made Me Do."

Harris posted the image below on Instagram Friday night. It shows him in the studio drinking what he calls "blood." Some think this is a reference to Swift's hit "Bad Blood." Others think it may be a sign that Harris will fire back at Swift on his next album.

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Either way, the photo sparked speculation that Swift wrote "Look What You Made Me Do" about her ex. The song is a clear shot at her rivals, with lyrics like, "I don't like your little games / Don't like your tilted stage / The role you made me play / Of the fool, no, I don't like you" and "I've got a list of names and yours is in red underlined."

Calvin Harris Blood Did Calvin Harris take a shot at his ex with this photo?

However, insiders told TMZ that the song has nothing to do with Harris. Instead, it was aimed at Kanye West and Kim Kardashian. Swift is apparently still mad about West calling her a "b---h" in "Famous" without her permission. West and his wife, Kim Kardashian, then released a phone conversation showing that they did discuss the lyric with Swift beforehand.

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 Swift maintained that while they did talk about the lyric, she never gave it the green light. And she apparently felt betrayed after West and Kardashian leaked this private conversation.

Listen to "Look What You Made Me Do" below.

But while "Look What You Made Me Do" may not be about Calvin Harris, there still could be some tension between the duo. After all, Harris infamously slammed Swift on Twitter last year after it was revealed that she co-wrote his song "This Is What You Came For." He then failed to thank her when the song won Best Male Video at the VMAs.

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There was also speculation that Swift wrote Little Big Town's hit "Better Man" about Harris, though that was never confirmed. Still, it doesn't appear that these exes will become friends again anytime soon.

Do you think Taylor Swift and Calvin Harris are still fighting? Let us know your take in the comments section below!