Ilkay Gundogan was booed by Germany fans as the team avoided a late scare to beat Saudi Arabia in their final World Cup warm-up game, in Leverkusen.
The Manchester City midfielder was jeered as he came on, and every time he touched the ball, after meeting Turkish leader Recep Tayyip Erdogan in May and calling him "my president".
Germany were looking comfortable at 2-0 after a goal from Timo Werner and an Omar Hawsawi own goal.
But Taiseer Jassam pulled one back.
And the Saudis, who have also qualified for the World Cup, should have had an injury-time penalty when Mats Hummels pulled Mohammad Sahlawi's shirt six yards from goal.