Dylan Hartley criticised Northampton's performance as "not good enough" after the Saints' Heineken Cup ambitions were all but extinguished by rampant Ulster.
Ulster secured a 25-6 bonus victory at Franklin's Gardens to inflict back-to-back European defeats on the Saints.
– Dylan Hartley, Captain, Northampton Saints
That was not good enough from us. We speak about intensity, they brought bags of it and we didn't bring enough. They are unbeaten and they showed why. They are a good team but we made them look better than it could have been.
"We had internationals returning, injured players returning and our strongest team on the field but you can't just turn up and expect it to happen and I think that happened tonight. We got showed up by a good team.
"They did exactly what we would like to do to another team. They forced us into errors. It is not good enough."