Roberto Mancini storms down tunnel in disgust DURING shootout as Heung-min Son helps knock out Saudi Arabia

Roberto Mancini left fans stunned after storming down the tunnel DURING a crucial penalty shootout at the AFC Asian Cup.

The Italian boss is currently head coach of the Saudi Arabia national team and saw his team facing South Korea in the last 16 of the competition.

Saudi Arabia looked set for a spot in the quarter-finals after Abdullah Radif gave them a 1-0 lead, however, that was cancelled out in the ninth minute of stoppage time when Cho Gue-sung took the tie to extra time and then penalties.

With Heung-min Son on the shootout scoresheet, Saudi Arabia and South Korea scored two apiece, before Mancini's side missed two consecutive spot-kicks, allowing South Korea to go 3-2 up with their penalty next to be taken.

But with Saudi Arabia's prospects suddenly not looking to great, Mancini decided that he'd seen enough.

Instead of waiting for what turned out to be the winning penalty, Mancini walked away from the pitch and made his way back to the changing rooms.

It was hardly the biggest show of support for his team, who ultimately saw themselves eliminated from the competition with South Korea claiming a 4-2 win in the penalty shootout to secure their spot in the last eight.

While it was a disappointing night for Saudi Arabia, the conduct of Mancini will undoubtedly be the biggest talking point.

The Italian has a glittering CV having won the Premier League with Manchester City, Serie with Inter Milan on three occasions and the European Championship with Italy, where they beat England in the final.

But after being eliminated from the AFC Asian Cup with Saudi Arabia, time will tell if he'll get the chance to guide them to future success.