Former Arsenal manager Unai Emery admits that he struggled to find the ideal balance in the team.
The Spaniard was sacked in the middle of this season after the team's form slumped alarmingly.
The Gunners are still going through a rough patch, but are hopeful for the future under new boss Mikel Arteta.
Speaking about his time in charge, Emery admitted that he had a hard time finding a place in the team for his three best attackers: Mesut Ozil, Alexandre Lacazette and Pierre-Emerick Aubameyang.
"There are games in which you see Mesut's brilliance, linking with the attack," he told BBC Sport.
"But also I had to find players around him in which he felt comfortable.
"Also, the team needed to feel solid and you have to, bit by bit, build a team that is aggressive, intense, as well as structured for good pressure.
"We also have to find a space for Mesut so he gives us an important part of the game which is his brilliant talent. To do so, I have to find the right connections between players, the right tactics.
"I was very motivated to try to find that. I wanted Lacazette, Aubameyang and Mesut to work together, each one of them with their own characteristics. But there were times when I had to leave one of them out of the XI."