Dundee boss Tony Docherty has explained the decision to leave Rangers-bound Lyall Cameron out of the clash with Celtic.

The 22-year-old has agreed a pre-contract with the Ibrox club and will make his big move to Glasgow this summer having come through the ranks at Dens Park and Dundee will be entitled to compensation for the midfield playmaker. At his press conference before the trip to Celtic Park, Docherty insisted the club’s prize asset fully deserves his move to Rangers and that he had no concerns about playing him for the final few months of his deal.

That led to raised eyebrows when Cameron was left out of the squad for the clash with the Scottish Premiership leaders - despite being snapped arriving in Glasgow's east end for the showdown. The Scotland youth international had started the previous game for Dundee at Tynecastle as Hearts ran out comfortable 6-0 winners during a disastrous afternoon for the Dark Blues.

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But boss Docherty has moved to clear up the mystery before kick off in Glasgow's east end, telling BBC Sportsound that the knock was an Achilles injury. "He played with it on Saturday and that just shows you the commitment that Lyall gives to the football club. He has been playing for the last couple of week with an Achilles injury.

"The physio and medical team felt that playing Saturday, Wednesday he is not in a position to play tonight. It is something that he has had for a wee while but we made the decision to give him every chance, and with the injury we are going to rest it down."