Johnny Walker upset the odds today, scoring an upset knockout victory over China's own Mingyang Zhang in their UFC Shanghai main event.

Johnny Walker (right) will face a tough test in the surging Mingyang Zhang. | 📷: Getty/UFC While Johnny Walker has answered adversity's demands before, more than two years have passed since he posted a victory.

Johnny Walker will look to get back in the win column when he takes on Zhang Mingyang in the main event of UFC Shanghai on Saturday. Walker is in dire need of a victory as he's been winless in his last three fights.