Napoli kept alive their hopes of advancing from Group C after Lorenzo Insigne, Victor Osimhen and Matteo Politano secured a 3-0 home win over Legia Warsaw.
Legia stayed top with six points from three games while Napoli and Leicester City, who enjoyed a rollercoaster 4-3 win at Spartak Moscow on Wednesday, have four each. Fourth-placed Spartak have three points.
Insigne fired Napoli ahead in the 75th minute with a superb first-time shot before in-form Osimhen netted his ninth goal of the season in all competitions and Politano sealed the win with a long-range strike.