Postecoglou was in attendance at Lord's for the third day of the Second Test against Australia, a clash that has seen England struggle.
Ben Stokes' side have struggled to compete so far, with Australia holding a comfortable lead.
That will be good news to Postecoglou, of course, with the Australian boss taking advantage of his new home in London to attend the third day of the Test.
After leaving Celtic last month, the 57-year-old faces the tough task of getting Tottenham back on track following a difficult season in which they finished in eighth spot in the Premier League.
A criticism aimed at Tottenham is their ability to be 'Spursy', a derogatory term that implies they lack fight and possess a soft underbelly which makes them easy to beat.
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So with England struggling in The Ashes against Australia, fans couldn't help but point out the coincidence given Postecoglou's presence.
One fan wrote: "Watching a very 'Spursy' type performance by England."
Another said: "Hope he's taking notes on how to win from Australia and not England."
A third fan said: "Realising cricket is more entertaining than watching his own team," while another added: "No wonder they bottled it."
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One more football fan said: "Useful for him to watch a team beat themselves by making the same mistakes over and over again. Will help prep him for Spurs."