The Republic of Ireland international came on at half-time in Tuesday's friendly at Tranmere but was withdrawn in the second-half.

He will stay behind at the club's Finch Farm training ground with striker Arouna Kone and defender Bryan Oviedo, who are still making their way back from knee surgery and a broken leg respectively.

However, England midfielder Ross Barkley returns to the squad for the match against the Premier League newcomers in Bangkok on Sunday.