Robbie Keane was on Saturday undergoing a scan just three days before the Republic of Ireland's decisive Euro 2012 qualifier against Armenia.

The 31-year-old striker complained of soreness in his abductor muscle after returning from Andorra during the early hours of Saturday morning following his side's 2-0 Group B victory.

However, manager Giovanni Trapattoni is confident his captain will be fit for Tuesday night's showdown with the Armenians, when Ireland need just a point to ensure they secure a play-off berth.

The Italian otherwise had no fresh injury problems, and his squad was boosted on Saturday by the arrival of Stoke frontman Jonathan Walters, who withdrew from the squad for the game in Andorra with an ankle problem.

Trapattoni's only new concern is finding a replacement for left-back Stephen Ward, who picked up his second yellow card on Friday night and will be suspended on Tuesday evening.

However, with Richard Dunne available after serving his own ban, the manager has options with John O'Shea's renowned versatility one possible solution.