The Chicago Blackhawks will be without forward Patrick Sharp for at least a month with a right leg injury.

Sharp was helped off the ice in third period of Tuesday's game in Montreal after being checked into the boards by Canadiens defenceman Alexei Emelin.

In 13 games with the Blackhawks this season, Sharp has three goals and nine points.

The 32-year-old scored 34 goals and added 44 assists in 82 games with the Blackhawks in 2013-14.