Victor Osimhen scored twice as Napoli cruised into the Champions League quarter-finals with a comfortable win over Eintracht Frankfurt.

With Luciano Spalletti's side two goals up from the first leg, the Nigeria striker's thumping header in first-half stoppage time dispelled any lingering nerves at the Stadio Diego Armando Maradona.

Osimhen doubled the Italians' lead on the night with a close-range finish from Giovanni di Lorenzo's cross eight minutes after the break and, having been brought down in the box, Piotr Zielinski converted the penalty himself to make it 3-0.

With a commanding 18-point lead at the top of Serie A, Napoli head into the last eight with a real chance to compete for top prize in European football.

The build-up to match had been overshadowed as Eintracht Frankfurt fans clashed with police after arriving in Naples despite being banned from attending the second leg of the last-16 tie.