RICHMOND has confirmed that onballer Kane Lambert will miss up to six weeks due to a punctured lung and cracked rib he suffered in an incident in the first quarter of the Tigers' 35-point loss to Port Adelaide on Saturday night.

Lambert, 24, was taken to hospital suffering breathing difficulties after being hurt in a marking contest as Brad Ebert caught him in the ribs with a knee.

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Tigers football manager Dan Richardson said Lambert would be sidelined for an extended period, compounding Richmond's dismal start to the season.

"He'll miss four to six weeks," Richardson told Triple M on Sunday.

"It's a fairly serious injury, he's a pretty sore boy today, I'm sure … (but) we've just got to stay together and keep moving forward."

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Coach Damien Hardwick said after the match that it was feared Lambert had punctured a lung.