Complex sentence: In his first 18 months in charge, he won two national championships and the 2013 Greek Cup; he was fired on 6 January 2015, whilst the side was still competing in the Europa League and only a point behind PAOK FC in the domestic campaign.
Split into simpler sentences: In his first 18 months in charge, he won two national championships and the 2013 Greek Cup. The team from Piraeus sacked him on 6 January 2015, while still in the season's UEFA Europa League and only a point behind PAOK F.C. in the domestic campaign.