Wasps finished their first outing in this year's Heineken Champions Cup in style as late tries secured them a 24-8 bonus point win at Welsh region Dragons.

Tries from hooker Tom Cruse, scrum-half Dan Robson and flankers Jack Willis and Thomas Young along with two conversions from centre Jimmy Gopperth saw Wasps home.

The Dragons scored a nice try from wing Jonah Holmes plus a penalty from fly-half Sam Davies and were close until the late burst.

The game may not have gone ahead at all after two Dragons players had to be re-tested for Covid-19 on Friday and were discovered to be positive.

Sale started the week by losing director of rugby Steve Diamond and ended it with a 26-14 defeat at the hands of Toulon in their opener.

Diamond left Sale on Tuesday after 10 years, for personal reasons, and without him the English side struggled to cope with their French opponents, for whom Louis Carbonel was outstanding.

France fly-half Carbonel contributed 16 points as Toulon's tries came from wing pair Gabin Villiere and Ramiro Moyano, but Sale rallied from 26-0 down.

Marland Yarde and Sam Phillips grabbed consolations, but Sale's poor discipline and line-out struggles cost them.

Bath fell at the first hurdle in their campaign, beaten at home for the second time in three seasons by Scarlets who triumphed 23-19.

The Welshmen were inspired by full-back Leigh Halfpenny who kicked three penalties and two conversions to keep his side within touching distance and then denied Bath fly-half Josh Matavesi a try at the death.

Bath could still have won the game deep into stoppage time but another last-ditch tackle on the goal-line, this time by number eight Sione Kalamafoni, prevented Ben Spencer from snatching victory for the English club.

Meanwhile, Pat Lam's Bristol were given a masterclass by Clermont Auvergne on their return to top-flight European rugby as the French heavyweights powered home 51-38 at Ashton Gate.

Clermont's bonus-point success confirmed them among this season's Heineken Champions Cup favourites, with Bristol conceding seven tries.

It was Bristol's first game in the blue riband European tournament for 12 years, and Clermont served an immediate reminder of the standard required.

Clermont's Japanese star Kotaro Matsushima scored a hat-trick, and there was a double for wing Damian Penaud, while centre Apisai Naqalevu and number eight Fritz Lee also touched down, with captain Camille Lopez kicking 16 points.

Bristol, to their immense credit, claimed five tries and a losing bonus point, with Max Malins, Harry Randall, Bryan Byrne, Ioan Lloyd and Siale Piutau all breaching Clermont's defence, while Callum Sheedy added three conversions and a penalty, while Malins converted late efforts by Lloyd and Piutau.

The west country club now have a mountain to climb in terms of quarter-final ambitions, but Clermont - runners-up in the competition three times - are off and running in breathtaking fashion.