West Ham boss David Moyes says they shouldn't complain about their workload ahead of facing Anderlecht.
West Ham reached the semi-finals of the Europa League last season and are well placed for another long European run.
They have won all three of their Conference League games, with Anderlecht second on four points.
The group winners will advance to the last 16, while the teams that finish second will play an additional two matches in a play-off against the sides that come third in the Europa League.
"Somebody said to me the other day we might have played as many [recent] European games as any club," said Moyes.
"Obviously we'd like to be in the Champions League but the point is, for West Ham who didn't have European football for such a long time, sometimes, you mustn't forget what we've got and you have to embrace and enjoy it.
"I'm not moaning about it, but [playing] Thursday, Sunday is not easy.
"For us at West Ham I think it's a great thing, you should never take it for granted because it might not always be there."