Jack Grealish did not take part in England's training session on Tuesday as Gareth Southgate's men prepared for this Friday's group game against Scotland.
The reason for Grealish's absence is not yet known but England's official social media channels confirmed the Aston Villa skipper was 'working away from the group' in a bid to get fully fit for the clash at Wembley.
Grealish had been suffering with a shin injury that kept him out for the second half of the Premier League season but did return to play in both of England's pre-tournament friendlies with Austria and Romania.