Liverpool head coach Arne Slot was most disappointed by teenager Amara Nallo's red card in their 3-2 defeat to PSV Eindhoven in the Champions League on Wednesday.

Nallo was shown a straight red after hacking down Johan Bakayoko in the 87th minute, just four minutes after coming off the bench for his senior debut in what was the first game that Liverpool have failed to win in this season's tournament.

Following the red, he became the youngest ever Liverpool player to be sent off.

"It is cruel, but he has never played first team football before and to make your debut in the Champions League is probably the hardest," said Slot.

"He misinterpreted the situation and it's a big moment to learn from. It is cruel when you think I'm making my Champions League debut but you go off a few minutes later.

"A career isn't always positive, it also has negatives and he has to make sure he plays in this competition again."

That was one moment from a hectic night in Eindhoven, where all five goals were scored in the first half.

A much-changed Liverpool twice led with a penalty by Cody Gakpo and Harvey Elliott's tap-in, but PSV hit back through Bakayoko and Ismael Saibari before Ricardo Pepi's deft finish put PSV ahead in first-half stoppage time.

Liverpool had already secured a spot in the round of 16 and ultimately finished top of the league despite losing. Captain for the night Andy Robertson acknowledged the carnage of the final evening, with 18 games happening at once.

Liverpool still ended the group phase on top of the standings with 21 points and will be one of the strong favourites heading into the knockout rounds.

Andy Robertson, captain for the night, said the new Champions League group stage format had produced "carnage" on the final evening of action with 18 games but was happy that Liverpool had got the job done with seven straight wins.

"I'm glad our place was settled," he said. "All the games on one night created excitement. We know whatever format it was, our aim is always to get to the last 16 and then we see if we can go further."

Liverpool will play Paris Saint-Germain, Benfica, Monaco or Brest in the round of 16.