Frank would like to see two-legged semifinals scrapped as he believes it favours the bigger clubs.
"There should only be one semi-final,” said the Dane. “I said that before at Brentford and that's why I'm very happy to say it again. For the smaller clubs, if you want to beat a bigger club, it's much much easier to play only one game.
"So if we really want someone to break out and it's not the same boring same teams that are winning - of course except for Spurs - then we need to skip one semi-final. For everyone else that plays so many games, it should only be one.
"So if it's about money then someone needs to fix it. If it's the Premier League paying money to the EFL, because as far as I understand it's because of that, so someone fix it. It should be very very easy.”
Tottenham go to Newcastle tonight for their Carabao Cup tie.