Sunderland defenders Phil Bardsley and Matt Kilgallon will not be joining the Black Cats on their tour of the Far East next week.
Martin O'Neill's side are due to fly to South Korea in the coming week to take part in the pre-season Peace Cup.
But neither right-back Bardsley nor centre-half Kilgallon will be on the plane.
O'Neill told the Shields Gazette: "Phil went over on his ankle and it's really sore. Nothing's broken, but he's done a bit of damage.
"He's very doubtful and I don't think the trip would be good for two things. One, he wouldn't be able to play and two, being back and forth on a plane would be no benefit.
"Matt had been trying to do some work himself over the summer to keep fit and he injured himself doing that. He came back with a bit of a problem, so the best thing to do is to leave him out."
- Transfer Talk: Sunderland Eye Phillips Move
- Sign A Gordon Armstrong - Says Gordon Armstrong
- Sunderland Legend Edits Fanzine - 18 Years After Death
More from Sunderland AFC
- Sunderland Head Coach Paolo Di Canio Happy With Transfer Team Effort
- Former Sunderland Midfielder Claudio Reyna Named Director Of Football At New York City Football Club
- Sunderland End Of Season Stat Attack: SAFC Had Premier League's Most Accurate Finisher
- Transfer Talk: Reported Sunderland Target Mbokani Hoping For Premier League Move
- PFA Warning For Sunderland Boss Paolo Di Canio After Players' Complaint
- Tyne And Wear Football Team Of The Season: What Do You Think?
- Have Your Say: Sunderland AFC Fans' Survey 2013
- 'Psycho Drama Queen': Phil Bardsley's Girlfriend's Twitter Attack On SAFC Boss Di Canio
Related tags: Sport
- Changing Lives Through Football: Homeless FA Comes To Sunderland
- LV= County Championship Durham CCC v Middlesex CCC: Day One
- Newcastle United No To Signing Andy Carroll
- Newcastle End Of Season Stat Attack: NUFC Had Worst Defence And Dirtiest Player
- Sky Sources: West Ham And Liverpool Agree Fee For Andy Carroll
- Have Your Say: Newcastle United Fans' Survey 2013
- Sunderland Boss Di Canio Criticises Phil Bardsley Over Casino Pictures
- Transfer Talk: Sunderland In For Striker Charlie Austin?
Related tags: Football
- Newcastle 0 - 1 Arsenal: Final Day Defeat As Steve Harper Says Goodbye
- Newcastle United Manager Alan Pardew Confident Over Future
Related tags: Sunderland
- Transfer Talk: Sunderland May Miss Out On Danny Rose
- Spurs 1 - 0 Sunderland: Bale Brilliance Sinks Paolo Di Canio's Side
- Paolo Di Canio: Sunderland Would Have Gone Down Without Me
- Transfer Talk: Simon Mignolet's Agent Rubbishes Talk Of A Move
- Tottenham Hotspur v Sunderland Preview: SAFC To Play With 'Dignity'
- Paolo Di Canio Fires Holiday Threat At Sunderland Squad