City were 4-0 up at halftime but continued to rip apart their vastly out-classed League One opponents as they ran up the biggest margin of victory in an English cup semi-final.
Burton's Clough believes stopping Guardiola's City, particularly when they travel to the Etihad on Wednesday, is a tough task.
"The result was good and of course we are already in the final but we have to play the second leg", said Guardiola.
Burton are now ninth in League One and as Sky Sports detailed before the match, the gulf between the two teams was astronomical. Then, after four days, we have another final at home to Wolves.
"They got a massive squad of players that cost a fortune and earning a fortune, that's what you get in the Premier League so it's chalk and cheese". "It's the best way to respect the competition and respect the opponents".
Basement side Huddersfield Town's 10 points after 21 games is the lowest by any Premier League team since Derby County managed seven points 11 seasons ago, while Fulham's tally of 14 points is the lowest for a team in 19th place for six years.
ESPN's Mark Ogden was not too impressed with City continuing to bombard the Burton defence until the final whistle.
Higuain knows Sarri well as he played under him during their time at Napoli where the striker arguably played his best football having scored 91 goals in just 146 games during a three-year spell at Stadio San Paolo.
"I take the cups seriously".
It is not just the League Cup that holds special memories for Clough, but also City - his last senior club before he joined the then part-time Burton as player-manager in 1998.
Asked if he wants Kompany to stay at City, Guardiola said: "We are considering it, we are talking about that".
"At half-time Pep said keep going in the same way, the same spirit and to see if we can score more". "My experience from previous clubs, when you have chance to reach a final you take it". Not at all, we have made history in getting this far.
"We expected that level of quality from the players they had out there. I saw a few minutes of games they played and they played good", Manchester Evening News reported quoting Guardiola.