The Irish side are currently preparing for their final Group E game against the leaders Italy knowing that only a win will do if Ireland are going to progress into the knock-out stages.
Ireland suffered a disappointing 3-0 defeat against Belgium on Saturday in Bordeaux which leaves Martin O’Neill’s side bottom of Group E on goal difference.
Speaking to the media earlier today, Keane wants to see the players physically ready for the third Group E clash and has hinted at possible changes.
Keane said: “What we certainly need, on top of everything else is to look after the ball a little better, cut out individual mistakes and our energy levels have to be pretty high.
“Generally speaking, over the years we’ve had to do a lot of chasing in games and when you do get on the ball, they’ve got to know how to deal with it.
“You get the recovery right, you get the team selection right and whatever team goes out there have to be ready physically.
“The players who’ve been left out have probably felt that even more so in training and deep down, and rightly so, feel as though they’re going to get their chance on Wednesday.
“We constantly speak to them, you’ve got to be ready. The squad players or the substitutions have to be ready to be called upon and that could happen in the next 48 hours.”
Watch the assistant manager Roy Keane at today’s press conference…