Spain midfielder Isco has emerged as a doubt for Friday's World Cup qualifier against Finland in Helsinki.

The 21-year-old is believed to have picked up an ankle injury during training yesterday, which ruled the midfielder out of a session this morning.

According to RFEF, the playmaker will also miss the second session this afternoon, but is expected to return to training on Thursday.

Isco has scored three goals in his first three league games for Real Madrid.