Former Arsenal coach Arsene Wenger admits he was amazed by Kai Havertz's early struggles at Chelsea.
The German, signed from Bayer Leverkusen in the summer, initially found it hard to adjust to English football.
But after he scoring the winning goal in the Champions League final, Havertz has been tipped for big things by Wenger.
"I believe that Havertz was very disappointing at the start," the former Arsenal boss told beIN SPORTS.
"I liked him and I was quite amazed how much trouble he had at the start to settle.
"He adjusted, adapted, he came back, he suffered, he spent his period on the bench and came back again. To me, he is a very promising player. I would bet on him for the future."
