Pakistan's new superfan at the Cricket World Cup wasn't angry — he was just disappointed.

The spectator featured on the global broadcast of Pakistan's last-gasp loss to Australia in Taunton on Thursday morning after he perfectly summed up his team's ability to let a victory slip through its fingers.

The man, who lives in London, was spotted by broadcast cameras standing with his hands on hips, clearly a broken man, as Asif Ali dropped his second catch of the day.

Ali's blunder to put David Warner down while fielding on the fence at third man was a sitter — but the fan standing just a few metres away on the rope refused to react.

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The man's internal struggle between wanting to jump over the fence and berate Ali and wanting to continue to support his team was written all over his face.

In the end it was the angel on his shoulder that won the debate.

The fan's speechless response left the ICC TV cricket commentary team in stitches.

Pakistan reporter Zainab Abbas was sent during the innings change-over to find out what was really going on in his melon at the time Ali dropped Warner — having already dropped Aaron Finch earlier in the innings.

With his comments of unwavering support for his team, the man won the world cup.

"It was just a straightforward catch," he said.

"It was really disappointing to see it happen right in front of me getting dropped. It probably showed all over my face.

"I could see it land on his hand and then he dropped it, so it was really disappointing to see it happen right in front of me. And I couldn't say anything because he had just come off a family tragedy, so I didn't shout at him."

Ali was last month re-called to the Pakistan World Cup squad following the death of his 19-month old daughter from cancer.

The fan's refusal to heckle him is everything golden about the World Cup.

Despite his team's frustrating performance during the 41-run loss, the fan remains positive about where Pakistan is heading this tournament.

"(Shahid) Afridi was very good on the boundary, so something to look forward to," he said.

"Our fielding was very good, except for the catching."

Pakistan certainly has something to be positive about in quick Mohammad Amir, who ripped through the Aussie batting line-up with figures of 5/30 from his 10 overs.

Pakistan captain Sarfaraz Ahmed admitted after the game his side has to raise their fielding standards ahead of a crucial World Cup match against arch-rivals India at Old Trafford on Sunday.

"We need to improve because if we want to beat bigger teams like Australia and India then all three aspects of the game are crucial," said Sarfaraz.

"Definitely I think the fielding needs improvement — the fielding is not up to the mark," the wicketkeeper admitted.

"We work together again, and work hard before the India match."

Pakistan have never beaten India in six World Cup matches dating back to 1992.