This is source I found from another site, main source you can find in last paragraph
The Real Madrid captain, Sergio Ramos, performed another rescue act to wreck Napoli’s comeback and take the Champions League holders into the quarter-finals after they had taken a first-half battering. Real won 3-1 on the night and 6-2 on aggregate.
The hosts, trailing 3-1 from the first leg, looked capable of overturning the deficit and took the lead through Dries Mertens. But with Real wobbling, Ramos headed an equaliser early in the second half and produced another header six minutes later which deflected into the net off Mertens.
Source : https://www.theguardian.com/football/2017/mar/07/napoli-real-madrid-champions-league-match-report