Republic of Ireland senior team manager Giovanni Trapattoni is confident both Robbie Keane and Richard Dunne will be fit for the opening EURO 2012 qualifier against Armenia in Yerevan on Friday (4pm, Irish time).

Ireland captain Keane had worn a knee brace earlier in the week but took a full part in Wednesday's training session in Dublin prior to the squad's departure flight to the caucuses while Dunne was rested from the workout as a precaution. Darren O'Dea, who sustained a knock during training on Tuesday, also sat out the session.

Trapattoni said: "I am optimistic. As a precaution, we left Richard and also Darren out of training, but I am optimistic because we have 48 hours.

"Richard I am sure about - and also it possible Darren could be on the bench.

"Richard still has this knock in the muscle, but hopefully tomorrow, he will train with us."

The manager has a decision to make as to which of his midfield options will be called upon to replace the injured Keith Andrews in the centre alongside Glenn Whelan.

Early indications suggest Paul Green is prised for his first competitive start but Trap revealed that Darron Gibson is another contender.

"Paul is confident, he has good personality," said the Italian. "He's fast, he's quick and I like his mentality.

"We have other players and today (in training) I tried Gibson with Whelan. I'm sure I can change but today I can say 60 per cent it will be Green."