Giovani then scored after half-time before Jamie O'Hara added a third late on to see off the Germans.
"The players have worked hard and it is good to have won these two matches," said Ramos, who saw his side beat Celtic on Friday.
"But they are friendlies and the team will continue to prepare for the new season.
"Giovani has settled well, I know him from my time in Spain. All of my players work for the team, and he will give a lot to us."