The 22-year-old's season has yet to take off after he suffered a groin injury with the USMNT in September. However, Reyna was a welcome attendee at Dortmund training on Tuesday and he could make Nuri Sahin's squad for Saturday's Bundesliga clash at home to Freiburg.
Reyna went on to miss USMNT duty in October and November as Mauricio Pochettino's team advanced to the Concacaf Nations League semi-finals with a 5-2 aggregate win over Jamaica.
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WHAT NEXT FOR REYNA?
The attacking midfielder will hope to get his season up and running for a Dortmund side currently lying seventh in the Bundesliga. Freiburg await on Saturday before they travel to Croatia to take on Dinamo Zagreb in the Champions League next Wednesday.