Complex sentence: He scored his first Championship goal for Charlton against his former club Leicester in which Charlton ran out 2--1 winners at The Valley as well scoring in the reverse fixture at the King Power Stadium in which Charlton also won 2-1.
Split into simpler sentences: He scored his first Championship goal for Charlton against his former club Leicester in which Charlton ran out 2--1 winners at The Valley. He repeated this feat, scoring in the reverse fixture at the King Power Stadium in which Charlton also won 2-1.