The Netherlands international suffered the injury during Barcelona's training session for the weekend La Liga game against Villarreal. Tests are ongoing, but sources suggest a possible muscle tear that could keep him out for up to seven matches across all competitions.
De Jong's absence will be particularly felt as Barcelona had nearly a full squad available for the first time in weeks. The captain would miss the Copa del Rey semi-final second leg vs Atletico Madrid, the Champions League Round of 16, and several La Liga fixtures, as well as the upcoming international break with the Netherlands.