Injured Collingwood skipper Nathan Buckley is expected to be back in AFL action within the next month.

Magpies coach Mick Malthouse says Buckley's troublesome hamstring, which he had surgery on two months ago, has been responding well to training.

The Magpies, who have turned around their season in the past fortnight, face a huge game against high-flying Geelong on Friday night at Telstra Dome.

The match is almost sold out, with just limited standing room tickets available.

Buoying the Magpies further is a new four-year sponsorship with Coca-Cola-Amatil.

The deal incorporates the Magpies' four-year health, fitness and mentoring program for Victorian primary school children called Active Factor - developed by Collingwood vice-captain Tarkyn Lockyer.

The program involves Magpies players conducting health and fitness sessions in more than 50 schools.

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