Olivier Giroud has explained that he left Arsenal so as to avoid becoming “a second reserve” with Pierre-Emerick Aubameyang’s arrival.
Giroud joined Chelsea on transfer deadline day in January, and scored his first goal for the club in the FA Cup win over Hull last week.
The striker is set to play a key role for the Premier League champions, with Alvaro Morata struggling with an injury.
Arsenal have just added Aubameyang to their forward ranks, and so opportunities in north London were likely to be limited.
“It was frustrating at Arsenal obviously. For a year and a half, it went from bad to worse. I could no longer continue like that,” Giroud told France Football.
“I could not bring myself to spend another year at Arsenal and remain a reserve, even a second reserve.
“The future looked gloomy with the arrival of a new striker [Aubameyang]. I wanted to become happier again by playing, so I left – it is as simple as that.
“The easiest solution was to go to Dortmund. Arsenal were happy, Dortmund as well.
“It was the offer most interesting, financially speaking. I have a very good contract at Chelsea but Dortmund really wanted me.
“It happened after a game of poker, like in all transfers. It dragged on, I started to get stressed because my third child was born at that exact moment. That was also why I did not want to go to Dortmund.
“Spending four months without seeing him, I do not know how I could have done it. It was why, I needed to take the bull by the horns.
“I went to see the coach to ask him where he was with Aubameyang. I put him under a bit of pressure, like my agent, who I spoke to several times a day.
“It is normal. I did not want to be deprived of going to Chelsea, which was the best solution for me.
“The coach immediately said to me: ‘Don’t worry, I will do my best so that you are happy’.
“On one side, it was normal. I had never asked to leave. On the other, I knew that he would not cause problems given the relationship we had always had.
“He even said to me that it would p*** him off if I did not go to Russia.”