Athletic Bilbao goalkeeper Alejandro Remiro was rushed to hospital on Wednesday after suffering a head injury when he was struck by a ball in training.
"The tests carried out (radiography, scans) have not revealed any significant injury", Bilbao said in a statement.
"It is expected the player will remain under observation in the coming hours."
Remiro, 21, has yet to make his first team debut with Athletic, but has been capped at under-19 level by Spain.
"Thank you to everyone for your messages of support. I will soon be fighting back on the pitch," Remiro tweeted. Remiro's teammate Bent Extebarria described the incident as a "big scare".
"The truth is that is was a big scare because it was powerful strike," said Extebarria.