Celtic suffered a narrow 2-1 loss to Bayern Munich on Tuesday night.
The Celtic marksman appears to be playing the best football of his career in Glasgow.
Celtic have recruited remarkably well from abroad over the years.
Sinclair swapped Aston Villa for Celtic last summer, a decade after former Bhoys man Petrov moved in the opposite direction.
Brendan Rodgers’s Celtic are going strong in the Scottish Premiership at the moment.
Should Glasgow Rangers make a move for Aston Villa forward Rushian Hepburn-Murphy in the January transfer window?
Stuart Armstrong joined Celtic from Dundee United in February 2015.
The Frenchman has been in fine form this season for Celtic.
Larsson, Sutton, Petrov - imagine what Rodgers could achieve if he had this lot at his disposal.
Celtic were humbled by the Bundesliga side last night.