|Giovanni Reyna.||Photo: Marco Verch, CC BY-SA 2.0|
"It's slowly getting better for him," Rose told reporters ahead of Dortmund's Bundesliga clash with RB Leipzig tomorrow.
"We hope that we can gradually take further steps forward, yet we can't yet foresee when he'll get back. Hopefully he will be an option again this year."
Before picking up the injury, Reyna featured five times for Dortmund this season, racking up two goals and an assist.