Johnny Walker pulled off a shocking upset by stopping Zhang Mingyang in the main event of UFC Shanghai.Walker was a huge underdog heading into the light heavyweight bout against China’s hero Mingyang, who has subsequently now tasted defeat for the first time in the UFC.Walker closed the show at the midway point of round twoGettyMingyang looked devastated having suffered his first UFC defeatGettyMingyang had dominated the opening exchanges of the fight, but found himself wobbling following a nasty calf kick from his Brazilian counterpart.Walker immediately capitalised on his wounded opponent and pounded on the ‘Mountain Tiger’ to finish the fight on the canvas.You could’ve heard a pin drop inside the Shanghai Indoor Stadium, and the crowd couldn’t believe their eyes.Mingyang went into the UFC Shanghai main event on a 12-fight first-round finish winning streakHe had been labelled China’s next big MMA star with high hopes from fans that he would one day become a UFC champion.“That was shocking,” UFC commentator Michael Bisping uttered as Walker closed the show in style.MORE TO FOLLOW…