"The little case I have for my guitar also fits two racquets in it," she told wtatennis.com.
"And that's how I've always travelled - I always have two racquets with me in the case so it's kind of cool, no one knows I play tennis when I'm at the airport. Everyone thinks I'm just carrying a violin. But at the moment, my bag is actually lost, so I don't know where those two racquets are."
She will line up in the French Open main draw next week as she attempts to advance to the second round for the first time since 2014.
Erakovic, who said she listens to Kings Of Leon, The Killers and The 1975, wasn't sure what to expect when she released the EP earlier this year.
"When I put this thing out there I just thought, well, here we go. I never really wanted to tell people about it, probably because I think I have a terrible singing voice so I didn't want anyone to know I was singing. But I really enjoy it, if it doesn't turn into anything down the road it'll always be a hobby for me, and music will always be a part of me as well as tennis - I think I enjoy them both equally."