The youngster's calmness in defeat at Arsenal amazed his experienced fellow defender.
Riether told the Fulham Chronicle: "If you see him playing, it's like he has played 250 games. It's unbelievable. He's doing a very good job and I hope he continues like that.
"He is a confident player and he shows it in training too. And it's not only that he's a good player. He's talking a lot on the pitch with everyone, and for a young man, it's really impressive."
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