Robbie Keane took part in full training on Monday in a bid to prove his fitness for the Republic of Ireland's Euro 2016 opener against Sweden on 13 June.
Keane, who missed the warm-up games against the Netherlands and Belarus with a calf injury, trained with his leg strapped.
Jonathan Walters and Robbie Brady sat out the session in Abbotstown.
The squad were given the weekend off but resumed training on Monday and will travel to France on Wednesday.
Manager Martin O'Neill put the squad through their paces at their Dublin base with Everton midfielder James McCarthy also taking a full part in the session having recovered from his groin and hamstring injury.
Captain Keane 'improving'
Asked if record goalscorer Keane remains on course to be fit for next Monday's match against the Swedes, O'Neill said: "Robbie did a little bit of work - he's improving by the day, which is good news.
"I don't know if he will be available for Sweden. But he's definitely improving."
Stoke forward Walters sat out the warm-up as he gets over his Achilles strain, as did Norwich winger Brady.
The pair trained separately but O'Neill is hoping they will be fit for the Group E opener at the Stade de France.
"Jon has had a bit of a problem for the last few days, but he's feeling a good bit better.
"He didn't participate in training today and probably won't tomorrow either, and we'll see what he's like when he gets to France.
"Robbie Brady suffered a back spasm at the weekend and didn't train today."
The Republic face Belgium and Italy after their match against Sweden.