Barcelona midfielder Alex Song admits it was difficult telling Arsene Wenger he wanted to leave Arsenal.
Song admitted Wenger had been a source of great help to him when he arrived at Arsenal as a teenager but there was no way he could spurn such an opportunity.
He told El Mundo Deportivo: "It was in July. Barca spoke with Arsenal and Arsene Wenger came to tell me. It was hard to convince him and also say goodbye because he really helped me and my family when I arrived at Arsenal at 17 years old.
"When a club like Barcelona want you you can't say no. A chance like this only happens once in life and you must take it."