The Senegalese marksman Demba Ba has suffered a horror leg break while playing for Shanghai Shenhua in a Chinese Super League derby against Shanghai SIPG on Sunday. Ba collapsed in the 63rd minute of his side's 2-1 victory after a challenge from Sun Xiang, with his left leg giving way beneath the knee as he fell to the ground.As the pair fell, Ba's left leg was caught between the turf and his opponent's boot, bending at a sickening angle and then appearing to snap gruesomely below the knee. Shenhua's medical team raced on to the pitch without waiting for the referee's signal and the match was stopped for eight minutes while the Chinese Super League's top scorer, with 14 goals, was treated on the pitch before being taken to hospital. Speaking after the match, a visibly shaken Shenhua coach Gregorio Manzano said the incident was potentially career-ending."In my 33 years as a coach I have won, drawn and lost games, but today is the most bitter victory because what happened to Demba Ba is what no one ever wants to see," Manzano said."Football is unfair sometimes to let such a terrible thing happen to such a good man. That could end a player's career."Shenhua, who won the match 2-1, described the injury as a broken leg and said the incident - for which Sun was not booked - was "unfortunate" in a statement released yesterday.Manzano told local media that Ba, who also played for Newcastle and West Ham in England, would be out for at least seven months."If I can choose, I'd rather lose the match than lose Demba Ba," Manzano told the Shanghai Daily newspaper. SIPG's coach, former England boss Sven-Goran Eriksson, expressed sympathy, according to Shanghai Daily, saying: "It was a bad injury. I'm very sorry for Ba."Beşiktaş wished Demba Ba a speedy recovery in a club's official statement. Ba's other former club Chelsea posted a message of support on their official Twitter feed."All at Chelsea FC send our best wishes to former striker @dembabafoot. Get well soon Demba." it said.The incident took the gloss off a pulsating and tempestuous Shanghai derby watched by more than 24,000 fans that saw 10 yellow and two red cards as both sides finished with 10 men. Chinese international forward Wu Lei put SIPG ahead in the 55th minute with a stunning strike from outside the box. Shanghai-born playmaker Cao Yunding equalized for Shenhua with just three minutes of the 90 left, before a Freddy Guarin penalty five minutes into added time sealed a dramatic 2-1 win for the home side.