Southgate knows the team have to find their “next level” as the knockout phase gets under way against Slovakia in Gelsenkirchen.
The Test captain visited the England squad at their Middlesbrough training base before Gareth Southgate’s men jetted off to Germany.
The Bayern Munich striker has scored six goals in his last six appearances in knockout games for England.
Germany 2-0 Denmark: A match briefly suspended by a thunderstorm was eventually won thanks to goals from Kai Havertz and Musiala but the hosts must improve if they are to lift the trophy