​​Manchester United manager Jose Mourinho has warned that the new rules of the Carabao Cup would result in more giant killings in the tournament, even as his team prepares to face ​Derby County.

Frank Lampard brings his Championship side to Old Trafford to face his old manager Mourinho's United side, and will be hoping to come away with a win. The new rules for the League Cup now mean that if the game ends in a draw in regulation time, then the tie goes straight to the penalty shootout without any extra time.

Mourinho is happy that his team will not have to pay any extra time, but at the same time warned that the new rules mean there would be more giant killings.

“I think it’s good because no extra time,” said Mourinho, according to the ​Evening Standard.

“Especially (for) the teams that are playing European competitions and especially when it goes to the end of the competitions (because) extra time is really, really difficult.

“But I think it is a good advantage to the teams that are not favourites because a draw takes the game immediately to a penalty shoot-out and we know that it’s a lottery.

“So there is a better chance for the teams not considered favourites, which I think brings some more beauty to the game and brings more possibility of killing giants because how many times (do the) big teams in 30 minutes of extra time win the ties?”

“I’m just thinking about the matches and this one is a cup match and the rules change,” he said. “In this moment you don’t even have the possibility of after a draw playing 30 more minutes - you go straight to a penalty shootout which obviously is a 50-50 situation. So it is a match of 90 minutes, which we have to try to win and the choice of the players is based on that. We have to try to win.

“I like the cups and of course everybody knows the difference between the FA Cup and League Cup, but as a cup competition I like the feeling of the knockout. You win, you are in the competition, you lose, you are out.

“I like that pressure and honestly I think fans they also like it.”