FR 3813 then GQ 921 at Madrid
Bologna → Madrid → Athens
Timetable, Madrid time
21:35FR 3813 from Bologna at the gate
14:20GQ 921 to Athens leaves the gate
16 h 45 apart on the timetable, overnight
GQ 921 leaves 16 h 45 after FR 3813 arrives on the timetable: more than half a day, so not a connection we count.