London Welsh's hopes of reaching the Amlin Challenge Cup quarter-finals were given a boost tonight by disciplinary chiefs.
French club Grenoble admitted a misconduct charge of fielding an ineligible player against London Welsh in a Pool Five encounter last Friday.
An independent disciplinary committee deducted Grenoble four match points and fined them €10,000 for fielding Lotu Taukeiaho in the fixture, European Rugby Cup announced.
Taukeiaho was not registered with ERC as a member of Grenoble's tournament squad, and was therefore an ineligible player.
Grenoble won the game 20-9, but London Welsh have now been awarded a 28-0 victory and five match points.
It means the Aviva Premiership newcomers move from third to second in the pool, now three points above Grenoble, and five behind group leaders Stade Francais.
Only the group winners secure a quarter-final spot, though, and London Welsh still have to tackle Stade in Paris.
The misconduct complaint against Grenoble was brought by ERC.