"The last home game of the season and we lose the game in the last minute. It's always hard to take," head coach Monk said.
"We suffered first half, possession-wise, playing against a very good team in Southampton. They worked their possession well.
"But we had three really clear-cut chances we should have scored from. I can't actually remember Michel Vorm making a save the whole game.
"In terms of possession, we suffered, but I think second half we got to grips with it a little bit better and we had the best chances. How we have come away from that game with nothing is hard to take.
"But I've said that a few times this season. It has pretty much been the story of our season. There was some very good defending for 90 minutes, then we let ourselves down with some schoolboy defending.
"We should be scoring from those clear-cut chances and we left ourselves open for the sucker punch, which we've done a few times this season."