Moussa Dembele. The Frenchman starred for the Parkhead club for two seasons before moving to Lyon in a £20million deal.Also included was a sell-on clause of 10-15 per cent, and that looked set to arrive when Dembele joined Atletico Madrid in January.The striker was signed on loan with an option to buy but his spell in Spain has been frustrating.The 24-year-old tested positive for Covid-19 shortly after arriving, and fainted in training on his return.