John O'Shea is a major injury concern for Republic of Ireland ahead of Tuesday's Euro 2012 qualifier with Russia.
The Sunderland defender is receiving treatment on a calf injury he picked up in Friday's 0-0 draw with Slovakia.
O'Shea, who started at right-back against Slovakia, is a candidate to replace the suspended Sean St Ledger in Moscow,
Republic of Ireland boss Giovanni Trapattoni will give O'Shea until the last minute to prove his fitness ahead of the crucial qualifier.
Trapattoni also has concerns about keeper Shay Given, who was struggling with a back injury ahead of the Slovakia game.
Given did not train at Malahide on Sunday morning as medical staff assessed his problem.