Germany coach Joachim Low feels his team will have to improve after securing their place at Euro 2016 in a less-than-convincing fashion.
The world champions qualified for the finals in France as Group D winners but only after losing their penultimate game against the Republic of Ireland and then scoring a late winner against Georgia.
Low's men were becoming frustrated in their final qualifier in Leipzig after failing to make early dominance count and seeing Jaba Kankava cancel out a Thomas Muller penalty with a stunning strike.
Conceding another and slipping to defeat might have meant missing out on automatic qualification altogether but Max Kruse eased nerves with a 79th-minute winner just moments after coming on.
Low said on uefa.com: "We are like a boxer at the moment. We're landing punches but they're not knocking the opponent out.
"We won the group and can be happy about that, but I am not satisfied with the last two matches.
"It will take some hard work to get back to the level of performances of the World Cup but there is a long way to go until the finals and we know that a long period of preparation will do us a lot of good."
Low will look at the make-up of his team and try to modify their approach ahead of the finals next summer.
He said: "Tactically there are a few things we need to consider. Our style of play will remain mostly the same but there are some details that need adjusting.
"It is not our style to send long balls into the box. It would be better to approach the opponents' goal with combinations.
"But in France we will meet teams that will attack us, not like some of the defensive teams we have met recently."
Georgia, who were already out of contention in the group, withstood heavy pressure in the first half at the Red Bull Arena but gave the hosts some problems after the break.
Coach Kakhaber Tskhadadze said: "First of all I want to congratulate Germany on the victory but I also need to thank my players for a great performance.
"I am very proud of my team because we gave the world champions a run for their money.
"I don't think that any other opponent has created more chances against them during this campaign.
"It was important for me to see that we have developed. My first match as coach was against Germany in Tbilisi and today we proved that we are headed in the right direction. This was the best match since I took over."