Tottenham boss Mauricio Pochettino has cast doubt over Toby Alderweireld's chances of facing Juventus in the Champions League next week.
Spurs host the Italian champions next Wednesday with the last-16 tie level at 2-2 following their dramatic first-leg comeback in Turin earlier this month.
But key defender Alderweireld is yet to resume training after suffering a tweak in the same hamstring which kept him sidelined for four months this season.
"He is still recovering. He is still not participating with the group," said Pochettino.
"When you tear a muscle, then you are fit but fit to participate in training.