England will be without John Stones and Jordan Henderson for Monday's Nations League game against Spain in Seville.
Manchester City defender Stones and Liverpool midfielder Henderson are suspended after both were booked during Friday's 0-0 draw in Croatia.
Borussia Dortmund winger Jadon Sancho, 18, came off the bench for his debut in Rijeka and could feature again.
"We lose John and Jordan so there will be opportunities for others," said England manager Gareth Southgate.
"We're going to be playing in front of 60,000 people and we want to be as competitive as we can. We have to pick a team to represent the country as well as we can.
"We don't want to overburden players. Around friendly matches we can be more sensible but it's difficult around these games."
Spain top Group A4 in the inaugural Nations League having won their first two games, beating England 2-1 at Wembley in September.
Victory in Seville will be enough to see them win the group and book a place in the Nations League finals next June.
Spain defender Cesar Azpilicueta says his side "know what to expect" when they play England.
"We know England are a very strong team," said the Chelsea player.
"They reached the semi-finals of the World Cup. They have been working a few years together and play in a very good way. We know what to expect and England have to win if they want to qualify for the final four in June."
After exiting the World Cup in the last 16 against Russia, Luis Enrique's side has scored 12 goals in three games.
They thrashed Wales 4-1 in Cardiff on Thursday, with Paco Alcacer scoring twice and further goals from Sergio Ramos and Marc Bartra.
England captain Harry Kane says his side are "not quite there" in terms of keeping possession in the same way that Spain do.
"We've got different qualities," said Kane. "We've got great pace in the team, great one-against-one ability, and that's what we've got to try to exploit when we play them.
"It will be a tough game, but these are the experiences you want to be in."