London Irish boss Brian Smith has described his side's 32-14 defeat to Stade Francais, and in particular a late bonus-point score for Stade No8 Antoine Burban, as 'desperately disappointing'.
Irish were in the box seat prior to the trip to Paris after a brace of maximum-point wins and a 23-14 success against Stade at the Madejski Stadium last Sunday.
But it is the French giants who are now in control of Pool 5 after this result moved them level on points with the Exiles and Burban's 78th-minute try ensured they top the standings courtesy of having picked up more match points in the back-to-back games between the two teams.
"We threw a couple of guys from the bench on - George Skivington, Blair Cowan, Eamonn Sheridan - in an attempt to make sure we didn't concede the fourth try, so that was desperately disappointing," said Smith.
"It's debatable whether we played well enough to stop them getting a fourth try, but it's happened and we're desperately disappointed.
"At half-time I thought we could win the game. We lost a bit of composure and control at the start of the second half.
"It was very important to keep the ball in front of the pack and at half back we struggled to do that for 20 minutes after half time. We turned over some line outs but failed to get field position and, to be fair, we didn't play well enough to win."
Smith insists he hasn't given up on a place in the last eight, though, despite the fact that it would be a real surprise if Stade didn't pick up the full five points in each of their remaining games at home to I Cavalieri Prato and away to Lusitanos.
"We'll cop it on the chin and there's still a long way to go in this competition. If we pick up bonus-point wins in the final two games we'll give ourselves a shot," added Smith.