New Delhi, March 25 -- As the World Cup looms, France star Kylian Mbappe says his left knee that bothered him for weeks is now fine.

The Real Madrid striker was used as a substitute in his team's last two matches as he works his way back into form and has joined his France teammates ahead of a couple of friendlies in the United States this week.

"There was a lot of frustration, a lot of anger, and then also some anxiety at one point," Mbappe told French media late Monday at a promotional event. "I had reached a stage where I didn't know what was wrong with me. I didn't go through that period in the best way. I wasn't the happiest player in the world. But I'm happy now because it's truly behind me. It's all gone."

Mbappe had been in gre...