Arsenal's defensive star has been struggling to reach the same consistency after Germany's World Cup win.
For many, winning the World Cup is the pinnacle of one's career, and for Arsenal's Per Mertesacker, returning to the routine of club football is proving hard to do without his motivation and form suffering.
Despite Arsenal's patchy form, they are still just a couple of points off the top four in the Premier League and are in a strong spot in Group D, behind Borussia Dortmund but five points clear of the third ranked side.
However, performances in recent weeks haven't been the best, and the Gunners needed late shows against both Anderlecht and Hull to avoid consecutive defeats after going down at Chelsea at the start of the month.
Mertesacker has put his hand up and acknowledged his role in the showings, mentioning how difficult it is to go from winning the World Cup to returning to club football. He retired from international football after Brazil, highlighting an interest to focus on doing well for Arsenal as a significant reason, something he has admitted hasn't been easy.
“Personally it is difficult at the moment because that was really a long season last year and to come back from that World Cup and get the motivation back," said the former Werder Bremen man.
"I am nearly back, but you can feel there is something missing at the moment. With those games, the belief and the mentality is there, but the motivation will come back."
With the German having just a couple of cup wins to his name since becoming a professional, Arsenal's FA Cup win in May as well as one with Werder Bremen in 2008, it may be a case that building on winning the biggest footballing competition there is is proving a tall order.
"I am still not there [taking in] what happened in Brazil," the 30-year-old added. "Maybe in five or 10 years you can really realise what was going on there."
Gunners fans will be hoping Mertesacker returns to the top of game a little quicker than that.