Atletico Madrid defender Lucas Hernandez has hailed the early impact of summer arrival Thomas Lemar.
The pair are together with France this week.
Lucas said: "He is a very great player.
"He's quickly adapted to Atlético, while it is not easy to adapt in such a club. Antoine Griezmann had trouble. He is indisputable.
"This is not the case with the national team, but he gives everything. He has a very good mentality."