Mikel Arteta was asked about Pierre-Emerick Aubameyang's appearance in a BT Sport advert ahead of Arsenal's clash with Chelsea on Sunday. Aubameyang joined the Blues in the summer, following a brief stint at Barcelona after four seasons with Arsenal. Appearing in a video to promote the game he said: 'Arsenal, nothing personal. I'm back, I'm blue, I'm ready.' Arteta acknowledged the threat the 33-year-old striker poses to his team when they visit Stamford Bridge for the midday kick-off. '[He's] very dangerous. You know, if Auba's got something it's the ability to put the ball in the back of the net and he's going to be doing that [until] the day that he decides he's had enough of football.'