Chelsea Striker Nicholas Jackson has launched a fierce social media response against former Club hero John Obi mckl after the ex- midfielder criticized his performance following Chelsea's recent 6-2 to victory over wolver Hampton Wanderers Jackson talked to Instagram to tell ml to shut your mouth don't talk we are killing ourselves for Africa ml now a pundit had previously expressed disappointment in Jackson's abilities after Chelsea's 2 to zero loss to Manchester City questioning the strikker capacity to deliver crucial goals for the team his comments sparked frustration among fans and players alike leading to Jackson's fiery retort