Per Mertesacker says that suffering embarrassing defeats hurt the squad . The Germany international has been a key player for Bayern since joining from Borussia Dortmund in 2011 and is now one of their most important players. CLICK HERE to follow all the live updates of Arsenal vs Liverpool . CLICK HERE to read all the latest Arsenal news .
Per Mertesacker says that suffering embarrassing defeats hurt the squad . Losing heavily forced the players to bring back the 'arguing culture ' Since then Arsenal have improved and could still finish second . CLICK HERE to follow all the live updates of Arsenal vs Liverpool . CLICK HERE to read all the latest Arsenal news .