Error-strewn PSG trailed 3-0 and then recovered to lead 4-3 before conceding an injury-time equaliser to Serhou Guirassy - the draw taking the champions 13 points clear at the top.

It was the first time PSG have conceded three goals in the first half of a league game since February 2012.

They next face Borussia Dortmund, who have netted 24 goals in their past six games, in the European Champions League on Tuesday.

"It's obvious we can't be happy conceding four goals. We weren't concentrating at 100% in the first half," PSG coach Thomas Tuchel said.

"We didn't start the game well enough. We didn't show the right mentality for this game."

PSG had got away with making mistakes in their previous three games but trailed 3-0 within 40 minutes against a side fighting relegation in 19th place.

Amiens could have had more first-half goals, before Ander Herrera netted for PSG leading into the break.

Guirassy opened the scoring after five minutes and combined brilliantly with Gael Kakuta for Kakuta's stunning strike into the top corner in the 29th.

Forward Fousseni Diabate made it 3-0 for the hosts on 40 minutes.

But Herrera thumped home from Julian Draxler's corner to give PSG some hope at the break.

Moments after Kakuta missed a chance to make it 4-1, 17-year-old midfielder Tanguy Kouassi twice rose superbly to head in two corners from Angel Di Maria for 3-3.

Amiens could not cope and striker Mauro Icardi tapped home from left back Juan Bernat's cross to put PSG ahead in the 74th.

After Edinson Cavani missed a chance for a fifth PSG goal - and his 200th for the club - Amiens broke up field and Guirassy turned in a cross from the right.

Nice moved up to eighth place after winning 2-0 at last-place Toulouse, with goals from attacking midfielder Pierre Lees-Melou and defender Christophe Herelle.

Toulouse, who are 14 points from safety, had a player sent off in each half.

Ninth-place Bordeaux drew 2-2 at home to 18th-place Dijon and mid-table Nantes drew 0-0 with visiting Metz.

Nimes continued their revival by beating Angers 1-0 and moving out of the relegation zone into 17th.

Australian Associated Press