Gavi was spotted in Barca's training ground on Sunday ahead of the clash with Real Sociedad on Monday. He was, however, not seen participating in the session.
The 19-year-old has been out of action since November after sustaining ACL and meniscus injuries while on international duty with Spain.
Those issues meant he was incredibly unlikely to play again this term, but there had been hope of him stepping up his recovery in time for the start of next season.
The typical recovery time from an ACL injury is seven to nine months, but adding a meniscus tear on top adds another two to three months to his recovery timetable.
Even after his knee fully heels, Gavi will need a further month to return to peak physical condition from a footballing standpoint.
Therefore, the teenager is not anywhere near full fitness as he may have joined his teammates in training to motivate them.
