MotoGP World Championship leader Jorge Lorenzo escaped serious injury in a spectacular crash during the first practice session for the Grand Prix of China this morning (Friday). Lorenzo, who celebrates his 21st birthday on Sunday, was thrown high in the air when he highsided from his Fiat Yamaha coming out of turn two. The Mallorca - based rider who won his first MotoGP race in Portugal three weeks ago, was rushed to the medical centre at the Shanghai circuit and then taken to hospital for a scan. Incredibly Lorenzo, who is the current 250 cc World Champion, was diagnosed with a chipped bone in his left ankle, bruising to his right ankle and right knee but no fractures. A decision if he will be fit to ride in the qualifying session tomorrow afternoon will be made later.