England Under-21 pair Nathan Redmond and Nathaniel Chalobah will be assessed on Friday to see if they have a chance of playing in Tuesday’s European Championship semi-final.
Southampton forward Redmond and Chelsea midfielder Chalobah were both replaced in the first half of the 3-0 win against Poland.
Manager Aidy Boothroyd said: “They have been massive players for us, in qualifying and here.
“We will see how they are.”
Chalobah lasted 39 minutes before limping off with a groin injury, while Redmond was replaced at half-time with an unspecified problem.
Derby midfielder Will Hughes – who is set to join Watford for £8m – replaced Chalobah, while Norwich winger Jacob Murphy came on for Redmond in attack, scoring the second goal.
“Nathaniel felt a little bit stiff around his groin area and we felt it best to bring him off, we didn’t want to make it any worse,” added Boothroyd.
“Redmond was the same, we just felt that if he had kept going he might have done some real damage.
“We have five days now and I want all 23 players available for the semi-final. Over to you, medics.”
England were facing elimination at half-time of their second game against Slovakia but came from behind to win, and were always in control against the hosts Poland once Demarai Gray had hit a sixth-minute opener.
Boothroyd is now in confident mood ahead of Tuesday’s semi-final, even though England will not learn who their opponents will be until Saturday.
“It’s a great moment,” the former Watford manager said.
“After the first game which was a draw it was a bit doom and gloom but we have a good group here and got the two wins that we needed. It was a high-pressure game, if we hadn’t won then we would have been out.
“We carried out the game plan to a T. We controlled the game and played really well.”