The 22-year-old forward scored a hat-trick as Germany won 5-3 away to Sweden in Tuesday's World Cup qualifier.
Low told www.dfb.de: "I told him recently that last year I wasn't very happy with his development. But now, in some games with us and in England, he has shown again what he can do.
"He is dynamic, works back well and has a strong finish. His physical strength was also always an issue, but he has worked well. If he continues to play like that, the World Cup will certainly not pass him by."
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