Arsenal manager Arsene Wenger says strikers Theo Walcott and Olivier Giroud will be rotated this season.
The Frenchman scored the first goal against Bayern Munich in the Champions League, his fifth of the season.
Walcott, 26, scored four goals so far and is the first choice for the 66-year-old but things could change in the coming weeks.
"You have to accept that no club in the world can play the whole season with only one striker," Wenger told reporters.
"If I would do it then you would first accuse me of being irresponsible.
"Once you have two players you have to be happy and make the right decision. It's always hard. It's not only hard for Giroud and Walcott, but for every single player who you leave out.
"It's a difficult decision but it's part of our job as well. We are in a job where competition exists and we have to accept that.
"They are top players, I consider the form, the game on the day but at the end of the season both will have played their share of games.
"At the moment it is Theo but in a few weeks it might be Giroud. What is important is that both contribute."