Harry Redknapp won the FA Cup with Portsmouth in 2008 - but, as he tells hotspur this month, he's also endured his fair share of upsets in the famous old competition.
The main shocks came during his time as a player at West Ham between 1964-72.
"We had some real nightmares at West Ham," he recalls in January's issue of the club's popular magazine.
"I remember going to Hereford and scraping through when they were a non-league team. It was the year they famously beat Newcastle with that Ronnie Radford goal and that win really took the whole country by storm. We ended up winning 3-1 in a replay.
"We also lost to Mansfield. They were in the old Fourth Division and we went there for a fourth round tie (in February, 1969). We had Moore, Peters, Hurst, Brooking, Bonds and we got beaten 3-0. It's safe to say it's a competition like no other!"
As a manager, Harry has been dishing out the shocks - none more so than back in 1984 when, having just taken over at Bournemouth in the old Fourth Division, they knocked-out holders Manchester United.
And, as he explained, having been pushed to the limit by four Championship sides on his way to the trophy at Wembley in 2008, there is no way that he'll take lightly the challenge of Peterborough United at the Lane in the third round this Saturday.
"They were all tough games and this will be the same," he added. "There are no easy games in the FA Cup, that's for sure."
Harry is asked about his FA Cup memories plus a host of other subjects in his regular 'View from...' feature in hotspur, where fans send in questions for him to answer.