Sale prop Eifion Lewis-Roberts could be banned for two years after testing positive for morphine and pseudoephedrine following last season's Top 14 final.

The 32-year-old, who joined Sale Sharks last summer, failed a test after Toulon's defeat to Toulouse. Four weeks ago, seven months after his last match for Toulon, Lewis-Roberts' B sample was tested.

Sale were informed on Thursday afternoon that Lewis-Roberts had failed a drug test. A Sale spokesperson said: "The matter is in the hands of the Rugby Football Union and Premiership Rugby. Eifion has been rested for the last few weeks but he is available for selection for our match at London Welsh on Sunday."

Toulon flanker Steffon Armitage also tested positive for morphine after the French Top 14 final. He avoided a ban by successfully arguing the morphine came from two anti-inflammatory tablets he had taken before the match - a fact he had declare on his drug testing form.

The Toulon president Mourad Boudjellal said: "The player is not a drugs cheat. He took a product to relieve pain he was in and that is all there is to it."