Gloucester trailed EPCR Challenge Cup side Wasps 21-0 at half-time in their Gallagher Premiership opener, but roared back to claim a bonus-point victory.

The hosts, who will face Union Bordeaux-Bègles and Leinster Rugby in their Heineken Champions Cup pool matches, looked out of it at half-time, then bounced back with 27 unanswered points.

Charlie Atkinson, Brad Shields and Burger Odendaal scored Wasps’ tries, with Atkinson converting all three.

Louis Rees-Zammit's length-of-the-field try kick started Gloucester’s comeback, while Charlie Chapman went over to further increase home fans’ hopes.

Wasps had Tom Willis and Biyi Alo sin-binned before conceding a penalty try. Freddie Clarke’s score completed the comeback, with Adam Hastings kicking five points.

Sale Sharks, who will face Ulster Rugby and Stade Toulousain in this season’s Heineken Champions Cup, held off a Northampton Saints fightback to win their Gallagher Premiership opener 29-22.

Hosts Sale led 10-3 at the break thanks to Gus Warr’s try, converted by Robert Du Preez, who finished with nine points.

Sam and Luke James both went over in the second half before Tom O'Flaherty scored on his debut as Sale earned a bonus point

Tries from Tom Collins (2) and Ollie Sleightholme helped EPCR Challenge Cup side Northampton to a losing bonus point, with James Grayson kicking seven points.

Stade Toulousain made it two wins from two in France’s TOP 14 with a 28-8 success at home to RC Toulon.

Toulouse, who will take on Sale and Munter Rugby in their Heineken Champions Cup pool matches, led 20-3 at half-time and never looked back.

Tries from Matthis Lebel, Dimitri Delibes, Emmanuel Meafou and Peato Mauvaka earned early TOP 14 leaders Toulouse a bonus-point win, with Thomas Ramos kicking eight points.

EPCR Challenge Cup outfit Toulon replied through an Aymeric Luc try, Baptiste Serin having landed an early penalty.

Heineken Champions Cup returnees Gloucester Rugby got their domestic season off to a pulsating start after fighting back to defeat Wasps 27-21 at Kingsholm Stadium.