Borussia Dortmund's Germany stars Mario Goetze and Mats Hummels both remain doubtful for Saturday's Champions League final against Bayern Munich at Wembley, as they struggle to recover from leg injuries.
Goezte, 20, tore his hamstring in Dortmund's semi-final return leg at Real Madrid on April 30 and after three weeks of rehab training, the attacking midfielder could only train for an hour with the team on Tuesday before suffering a reaction.
"Mario felt something in the muscle and had to break off training, we aren't sure how bad it is," Dortmund's director of sport Michael Zorc told sports daily Bild after Goezte's first team training session since the injury.
Compatriot and centre-back Hummels, 24, who damaged his ankle in Saturday's shock 2-1 league defeat at home to Hoffenheim, sat out Tuesday's training completely to allow the swelling to subside and is receiving intense treatment.
If he is fit to play, the Champions League final will be Goetze's final appearance in a Dortmund shirt having actioned a clause in his contract to join German champions Bayern next month.
"If Goetze fails to make it, it would be fatal for Dortmund and will probably decide the match," said Switzerland coach Ottmar Hitzfeld, who coached Borussia to their last Champions League victory in 1997 when they defeated Juventus 3-1 in Munich.
"And I don't expect him to make an appearance," added Hitzfeld having labelled Goezte "already world-class".