Paul Lambert knows that if his side underestimate Newport County then they could be in for a difficult time this Saturday.
Whilst the Rovers boss has enjoyed his fair share of cup upsets whilst the manager of lower league Wycombe Wanderers, he's also been on the losing side with European giants Borussia Dortmund.
Having reached the quarter-finals last season, Rovers begin their Emirates FA Cup exploits against the League Two side at Rodney Parade later today, eager to avoid a cup shock and reach the fourth round. But Lambert insists they'll only do that if they approach the game in the correct manner.
"If we aren't right then we will have an uncomfortable afternoon," said the Scot.
"If we do it right and we are up and at them then hopefully we'll go through and hopefully our better quality will rise to the top.
"If we go there and think it is going to be pretty easy, no, we have to be right on it.
"Cup football can throw that at you, I remember getting beat at Dortmund in the German Cup away from home. We were European champions and we got beat by an amateur team 2-1.
"That happens all over the world, cup shocks are everywhere.
"If we don't go down there right and if we don't approach it right then it will be uncomfortable.
"The lads know what they've got to go and do on Saturday."
Fans are reminded that there are no tickets are available on the day at Rodney Parade. For those supporters who are making the journey to Rodney Parade there will be a dedicated away supporters bar facility with Sky Sports News on TV screens within the away section of the ground from 1.30pm.
Tea, coffee and hot food is also available from an outlet within the away end.
There is a designated drop off point for visiting supporters coaches on Corporation Road and the post code to follow is NP19 0BH.
Visiting supporter car parking is available at Fitness4Less on Corporation Road, adjacent to the away end entrance. There are also several public car parks in the City Centre within a short walking distance of Rodney Parade.