Lions boss Neil Harris expects to have a fully fit team at his disposal for Saturday's trip to Wolves.
Millwall will return to match action at Molineux Stadium after a "bittersweet" period between games, having taken their first scalp in the Sky Bet Championship before the international break.
"There's two ways of looking at it," Harris told millwalfc.co.uk.
"We want to get back onto the pitch and build on our 4-0 win over Norwich, but it's also given the majority of the group time to recover and get some quality work into them in training.
"The boys have been fantastic over the last break. They've been really professional and their attitude has been spot on."
Shane Ferguson, Conor McLaughin and Jordan Archer returned to training unscathed late this week after being included in their respective national squads.
"It's a great experience for them to go away and represent their country," Harris added.
"If they go away and have exposure to a different squad, different ideas and set-ups then it can be really beneficial for them.
"They are at the forefront of their countries' minds and they come back refreshed and with a spring in their step."
The manager is expecting a tough test against a talented Wolves outfit, but says Millwall have a great opportunity to surprise another promotion favourite.
"We will have to be at our best this weekend but we're looking forward to it.
"We have to impose ourselves on the opposition like we have in our previous matches. We have to be resolute defensively but also carry a threat going forward.
"That's our task, to strike a balance between being organised and attack-minded."