Complex sentence: Papastergianos is playing for Iraklis since 2006 and looks like he will have a promising carrer.After, his good performance playing for Iraklis, A.E.K was interested in signing him.
Split into simpler sentences: Papastergianos is playing for Iraklis since 2006 and looks like he will have a promising career. After his good performance playing for Iraklis, A.E.K was interested in signing him.