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Worried Paul Lambert reckons that protests from the Celtic fans are having a "negative effect on everything" at the club.
The Parkhead fans were heard chanting "sack the board" and directed their fury at under-fire supremos Michael Nicholson and Peter Lawwell at Dens Park.
Supporters chucked tennis balls onto the pitch to show their anger towards the board in the latest stand against the club before watching their side crash to a shock 2-0 defeat to Dundee.
It's the latest stand from the punters after they held a 12-minute protest at Kilmarnock before thousands of anti-board banners were held aloft at Firhill in the Premier Sports Cup victory over Partick Thistle.
And on Monday the Celtic Fans Collective - an umbrella group of ultras, fan media and