Cahill made his 50th appearance for the club in Saturday's 2-0 win at Hull.
He said: "I think we've done well most of the season apart from the blip.
"We played Stoke and Sunderland where we conceded more than we would have liked and people thought the wheels had come off.
"But if you look at the clean sheets we've kept it's something to be proud of as a team.
"Someone said it's three clean sheets in a row away for the first time in five years and that's also something to be proud of."
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