Leroy Sane has sparked speculation he could be close to a surprise comeback by training ahead of Manchester City's Champions League trip to Basel.
It now appears the 22-year-old, who has scored 11 goals this season, is ahead of schedule after he trained at the City Football Academy on Monday morning.
It was unclear whether Sane was fit enough to be included in the squad to travel for the first leg of the round-of-16 tie in Switzerland, but the development is nevertheless encouraging for manager Pep Guardiola.
Sane was also photographed participating in training last week but Guardiola said the Germany international's involvement was limited to running only.
Guardiola was also boosted by the presence of David Silva and Fabian Delph in Monday's session.
Silva has missed the last two games with a side injury and Delph, who has successfully filled in at left-back this season, has been out for a month with a knee problem.
Record signing Aymeric Laporte was not involved during the 15 minutes of training open to media under Champions League regulations.
Guardiola was due to update on the injury situation at a prematch press conference at St Jakob-Park on Monday evening.