Hoffenheim manager Julian Nagelsmann has challenged Reiss Nelson to fulfil his potential.

The Arsenal youngster, currently on loan with the German club, scored twice against Nuremberg on Saturday, taking his season total to four.

He was back amongst the substitutes for Tuesday night's draw with Lyon in the Champions League. And Nagelsmann has challenged the 18-year-old to find more consistency in his game.

"Reiss has huge potential to develop," Nagelsmann told reporters in Germany.

"We must be mindful. Nelson's scored four goals, two very important ones against Nuremberg, but he's also had bad games.

"He needs to grow healthily. It's like in music – one song puts bread on the table but only for a few weeks.

"It's not about being a one-hit wonder, but about delivering good performances over a long period of time. Being the best over 15 years.

"He's also had negative outliers with us. It's about delivering the positive outliers consistently, showing those over and over again.

"Be careful when evaluating him. Let him grow in peace and don't get into his head. It's not easy to keep your feet on the ground at 18."