Chesterfield manager Lee Richardson is set to be without the services of defender Gregor Robertson for a month due to a thigh injury.The 24-year-old left-back was initially thought to be ruled out for the rest of the season but scans have allayed those fears.

Robertson has been instrumental in the club's promotion push and has been a virtual ever-present.

The Spireites, meanwhile, have revealed Jack Lester (ankle), Peter Leven (knee) and Derek Niven (toe) could be fit for Saturday's home clash with Brentford.

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