Southampton boss Ronald Koeman is angry Shane Long played for the Republic of Ireland this week.
Long made his return this week following five weeks on the sidelines with an ankle injury.
But despite Long's lack of action, Martin O'Neill played him in Ireland's biggest game in 14 years on Monday when they beat Bosnia and Herzegovina 2-0 to qualify for Euro 2016.
Koeman said: "I was very surprised he played 40 minutes.
"The player didn't train for five or six weeks, had only one training session on the Sunday and that is why I was surprised.
"The doctor Steve Barnes had contact with the Irish medical staff and my information was that he wasn't 100 per cent fit.
"In my opinion a player needs more training before playing 40 minutes but I understand because it was an important game which meant he country qualified for Euro 2016.
"But if I'm a national coach I don't put a player after five or six weeks with injury and one training session into an important game."