BERNE, Oct 29 (Reuters) - Greek club PAOK Salonica will have to play their next three European home games behind closed doors after losing an appeal against sanctions imposed by UEFA following a riot at a match in August. The club will also have to pay a 150,000 euro ($193,458) fine and face automatic expulsion from European competition if there is a repeat incident within the next three years, European soccer's governing body said Monday. The trouble broke out before the start of PAOK's Europa League qualifying tie at home to Austrian side Rapid Vienna on Aug 23. ... More...