Real Madrid's Martin Odegaard is unlikely to play again this season after breaking a metatarsal in what could have been his final game on loan at Dutch club Heerenveen.
Odegaard, 19, has contributed three goals and five assists in 37 starts for the Eredivisie side and gained experience away from the Bernabeu.
But the Norway international suffered the injury during Sunday's 2-1 victory at Heracles, with Heerenveen releasing a statement in which they said tests had confirmed the broken bone.
PEC Zwolle closed the gap on third-placed AZ Alkmaar thanks to a 3-2 win against Heerenveen in Tuesday's only Eredivisie game.
Wouter Marinus opened the scoring for the hosts in the 23rd minute and Zwolle doubled their advantage five minutes later through Younes Namli, with Youness Mokhtar providing both assists.
Eighth-placed Heerenveen left the pitch 2-0 down at the break but Denzel Dumfries' 69th minute goal got them back into the match.
However, Zwolle hit back four minutes later, this time after...