Belgium striker Romelu Lukaku has said new assistant coach Thierry Henry has advised him, Christian Benteke and Eden Hazard on how to improve their game.
Henry, 39, was appointed by new Belgium boss Roberto Martinez after rejecting a youth team coaching role at Arsenal.
"He took us to one side," Benteke told reporters. "He corrected my manner of getting away from markers.
"We stayed for a long time in front of the screen, and he pointed out our mistakes, corrected us. We listened carefully. It took nearly two hours, but it was great."
And Lukaku, 23, revealed that he addressed the Arsenal legend as "Monsieur Henry."
The Everton forward said: "It's a mark of respect. He's really with us and isn't distant. Sometimes he comes to drink tea or play PlayStation with us.
"He asks a lot, but that's what we need. He's good at communicating and makes himself heard.
"Concentration and effort are his staples. It's a plus to have him with us. I can assure you we listen when he speaks."
Belgium produced a disappointing display as they were beaten 2-0 by Spain in a home friendly last week.
Some home fans booed the team off the pitch at the end as Martinez suffered an inauspicious start to his reign.
Defender Toby Alderweireld admitted the dispiriting reverse had provoked some soul-searching ahead of Tuesday's opening 2018 World Cup qualifier against Cyprus.
"Of course we asked ourselves some questions," he told reporters.
"We know we weren't good and that we must do better. The only way to do that is to work."