GLOUCESTER will monitor the fitness of lock Alex Brown over the next seven days after he was ruled out of European Challenge Cup action with a neck injury.
The Kingsholm forward has been diagnosed with a disc problem that will be assessed over the next week.
He will not travel with the Gloucester side to Bayonne for their opening Challenge Cup game this Saturday. Head coach Dean Ryan said: "Alex has a disc problem and he will be spending the next seven days being assessed. Hopefully after that time we will get some positive news."
Brown has been one of Gloucester's stand-out players this season and has made 108 Premiership appearances with five tries.
"It's disappointing that the injury has happened at this stage but I will work hard with the medical team over the next week and aim to resume playing as soon as possible," Brown said.
Fly-half Billy Burns was named Man of the Match after the 35-14 European Rugby Challenge Cup victory over Stade Rochelais on Thursday evening, and was full of praise for all his team mates for the win after a short turnaround.
Gloucester have been in good form in recent weeks, but Backs Coach Tim Taylor knows that the Cherry and Whites will have to be at their best on Thursday evening (kick off 7:45pm) against a Stade Rochelais side flying high this season.
Speaking to GRTV after the bonus point win over Bristol, back row Lewis Ludlow revealed that despite a tricky first half, Gloucester backed their skills to come through, a faith that was evident in a strong second half showing.
Willi Heinz scored Gloucester's second try as the Cherry and Whites overturned a disappointing first 40 minutes and 0-6 half time deficit, to earn a 26-18 Aviva Premiership victory over Bristol Rugby on Saturday.
Gloucester's much changed side had to overcome conceding an early try on Thursday evening, but responded in style to down Stade Rochelais by 35 points to 14 in the European Rugby Challenge Cup and set up a mouthwatering return fixture next weekend.
After taking 11 points from their last three games in the Aviva Premiership, including bonus point wins against Wasps and Bristol, Gloucester will be looking to continue their good form when they welcome La Rochelle to Kingsholm.