Can played alongside Højbjerg back when he used to play for Bayern Munich’s B team.
“He’s a sublime footballer and there is nothing he can’t do,” Højbjerg told Uefa.com.
“You just have to look at how he established himself at Liverpool. And he’s done it at a very young age, so these experiences will really pay off one day.”
Can received a rating of 7.74 from WhoScored for his performance against Denmark U21.
Højbjerg provided three assists and scored two goals in 29 appearances while on loan at FC Augsburg this season.
Germany U21 take on Czech Republic U21 in their final group game and know a draw will be enough to carry them though to the next round.
The Liverpool star made a total of 27 appearances for the Premier League outfit this season and also featured in the FA Cup and Europa League.