The 31-year-old collapsed in agony after being tackled in the 63rd minute of the 'Shanghai Derby'. He received prolonged medical attention on the field before being stretchered off.
Warning: This video contains footage that may disturb some viewers.
Ba's coach said: "It could end his professional career. I would rather lose the game than lose Ba."
Striker Ba scored 43 goals during his time at West Ham, Newcastle and Chelsea.
Ba's captain at Chelsea, John Terry, wished him a speedy recovery.
Newshub.
