PSG opened the scoring after three minutes when Goncalo Ramos found Lee Kang-in inside the box and he sent a left-foot shot into the net.

The visitors' joy was short-lived, however, as Ramos was hurt in a challenge and the Portuguese international had to be replaced by Randal Kolo Muani, who rattled the crossbar shortly after entering the fray.

The hosts, who had a goal chalked off in the first half for offside, shocked PSG after the break as Gautier Lloris in the 48th minute, before Josue Casimir's goal was disallowed following a VAR decision for handball in the build-up.

Lee was then inches away from a second as he struck the woodwork, but five minutes before the end, the Le Havre defence went missing as three PSG substitutes ran riot.

Ousmane Dembele headed home in the 85th minute before Bradley Barcola added a third as he cut inside from the right less than two minutes later.

Kolo Muani then completed the rout from the penalty spot after he was brought down by Lloris' late tackle in the box.