A crucial decision for the Czech Republic on captain Tomas Rosicky's fitness will be made only hours before its European Championship quarter-final against Portugal.
Rosicky says his availability "remains open" for Friday's (AEST) match at the National Stadium in Warsaw.
Rosicky resumed training on Wednesday for the first time since he picked up an Achilles tendon injury during the 2-1 win over Greece on 12 June.
The injury forced him to miss his team's 1-0 victory over Poland on Sunday when his place in the midfield went to Daniel Kolar.
Rosicky says he will see how his injury responds to his first training session in more that a week and that only then will the final decision be made.
Gibraltar, the tiny British overseas territory boasting just one professional player, will take part in the EURO 2016 qualifying campaign after gaining UEFA membership - but will be kept apart from Spain.