Harlequins were outclassed by French champions Toulouse as they conceded seven tries in a 47-19 Investec Champions Cup thrashing at the Stoop.

However, four more Toulouse tries followed in the second half as Antoine Dupont's side ran Quins ragged.

Herbst scored the home side's only try of a disappointing second half.

Toulouse followed up the seven tries they scored against Cardiff last week with another dazzling attacking display that underlined their hopes of becoming champions for a sixth time.

They top the Pool 2 standings on points difference from Bath, while Harlequins, who stunned Racing 92 in Paris last weekend, are fourth.

The game was delayed for 10 minutes in the first half when Toulouse centre Pita Ahki made a head-on-head tackle on Quins lock Dino Lamb.

Lamb was carried off the pitch on a stretcher for further treatment, while Ahki only avoided a red card because he was deemed to be falling back in the tackle.

Toulouse start fast as Quins hang on

The game got off to an electric start with Toulouse's star backs showing their ability with the ball in hand.

Ahki side-stepped his way through Quins' defence and fed fellow centre Pierre-Louis Barassi to score the first try in the seventh minute.

South African centre Esterhuizen replied minutes later by powering over Thomas Ramos' attempted tackle and crossing the line unopposed.

But Toulouse hit back straight away with Ahki making the initial break on the left, Ramos taking the ball at pace through the middle and Dimitri Delibes scoring in the right corner.

The outcome of the match might have been different if the referee had sent Ahki off but the Tongan breathed a big sigh of relief when he was only shown a yellow card.

The injury delay resulted in a scrappy few minutes before Toulouse ran in a third try. Dupont and Scotland international Blair Kinghorn started a flowing move before Delibes ran past Quins' desperate defence and played in hooker Peato Mauvaka to dive over.

Quins' forwards dug deep to cut the deficit to 21-12 just before half-time. James Chisholm, playing his first match of the season after recovering from injury, and skipper Alex Dombrandt did the hard yards to give replacement second row Herbst the chance to score.

Toulouse run in four second-half tries

Any hopes of a second-half turnaround disappeared when Toulouse came out flying with an early try from wing Matthis Lebel following a well-worked line-out move.

Herbst crossed the line again for the hosts, but Toulouse scored a stunning try moments later.

Dupont weaved his way up the pitch, shaking off a Marcus Smith challenge, before a wonderful offload from second row Emmanuel Meafou enabled Barassi to sprint on to the ball and score his second try.

With Quins becoming increasingly tired, Toulouse stole a line-out that ended with replacement prop Rodrigue Neti powering over for his side's sixth try before fly-half Ramos completed the rout.

Harlequins will aim to get their campaign back on track when they travel to Cardiff in round three in January, while Toulouse play Ulster.

'Toulouse were awesome today'

Harlequins captain Alex Dombrandt told BBC Radio 5 Live: "They have stars across their team and when they make line breaks and there are offloads left, right and centre, it's tough to stop and regather momentum. Fair play to Toulouse, they were awesome today and deserved their win.

"We had a great win last weekend and wanted to challenge ourselves against another top team. It didn't go the way we wanted it to, but we are still in a good position in the pool.

"I can't fault the guys' efforts. We worked as hard as we could but we came up against a really strong team."

Line-ups

Harlequins: Green; David, Joseph, Esterhuizen, Murley; Smith, Porter; Marler, Walker, Collier, Launchbury, Lamb, Chisholm, Evans, Dombrandt (capt).

Replacements: Jibulu, Baxter, Lewis, Herbst, Cunningham-South, Care, Evans, Beard.

Toulouse: Kinghorn; Delibes, Barassi, Ahki, Lebel; Ramos, Dupont (capt); Baille, Mauvaka, Laulala, Arnold, Meafou, Cros, Jelonch, Roumat.

Replacements: Cramont, Neti, Ainu'u, Faasalele, Placines, Germain, Costes, Chocobares.

Referee: Chris Busby (Ire)

TMO: Brian MacNeice (Ire)