Complex sentence: On December 16 2014, Lamanna made his Serie A debut against Roma after Mattia Perin was sent off, where he saved Adem Ljajic's penalty in the 31st minute.
Split into simpler sentences: On December 16 2014, Lamanna made his Serie A debut against Roma replacing Mattia Perin who got sent off. Immediately, he saved Adem Ljajic's penalty in the 31st minute.