Gloucester Rugby stand alone as the only team still able to boast a 100 per cent record after Round 4 of the 13th Heineken Cup.
London Irish saw their perfect Pool 1 record go when they went down 23-6 in Perpignan but Gloucester made it four from four in Pool 2 with a 51-27 victory over Bourgoin.
Dean Ryan's team will complete the Pool stages with an away match against the Ospreys and then finally at home to Ulster Rugby as they bid to become only the seventh team to win all six of their Pool matches since the home and away format was introduced in 1997.
But none of the six who won six from six went on to win the Heineken Cup that season.
The six perfect Pool returns, with the eventual champions in brackets, have been:
1997/98 - Wasps - (Bath); 2001/02 - Bath - (Leicester); 2002/03 - Leinster - (Toulouse); 2004/05 - Leinster - (Toulouse); 2006/07 - Llanelli Scarlets, Biarritz Olympique - (Wasps).
