Nigel Clough and Billy Davies will cast fond memories of their former clubs aside when they meet in the FA Cup.

Clough's Derby County will play hosts to Davies' Nottingham Forrest on Friday in the FA Cup fourth round.

The tie throws together two clubs with new managers - each inextricably linked with their opponents.

Derby boss Clough has taken the step into league management for the first time after a decade at non-league Burton Albion, following in the footsteps of his late father Brian who managed both clubs.

Clough senior led the Rams to the old Division One title in 1972 but it is for his achievements just 17 miles along the A52 - which was renamed Brian Clough Way in August 2005 in his memory following his death the previous year - for which he is more widely remembered.

'Old Big Head' guided Forest to the league title in 1978 before recording back-to-back European Cup triumphs in the two years that followed.

Clough junior played for Forest under his father from September 1984 to June 1993 before returning to the City Ground for a loan spell during the 1996/97 season.

Despite his close ties with the Reds, Clough insists there will be no sentiment and that he will be 100% Derby tomorrow night.

"I've got very fond memories and they will never go away after supporting Forest for nine or 10 years and then playing for them for same period of time, but that all goes out of the window and I am completely Derby now," said the 42-year-old.

"All those thoughts and feelings will be confined firmly to the memory bank and it will be all about trying to get a result for Derby. There will be no divided loyalties or anything like that."

Meanwhile, Davies is poised to face the club he took into the Premier League prior to his departure from Pride Park 14 months ago.

Davies, Derby boss between June 2006 and November 2007, insists he will not get carried away with the emotions of the tie and that, like Clough, he is fully committed to his new club.

"It's no bigger than any other match. It's a great game of football between two great rivals," said Davies. "My loyalty is now to Forest and as a good professional I will do all I can to bring success to Forest and try to do exactly what I did at Preston and Derby."

Davies left Derby under something of a cloud and amid reports of a fall-out with chairman of football Adam Pearson.

Comments attributed to the Scot claiming that he wished the Rams' play-off final success had been with former club Preston then turned some supporters against him.

Despite his controversial departure Davies is looking forward to returning to Derby and believes he will get a good reception from the majority of the club's fans.

He said: "I will go there with my head held high because I am very proud of what I achieved there in a remarkably short period of time.

"I know what reaction I should get and most Derby fans still stop me and tell me they appreciated what I did for the club, but there is always going to be that hardcore to whom it is just Derby against Forest and they must abuse the Forest manager."

Clough hopes that is not the case, he added: "I would hope that both sets of supporters are respectful to both managers. Derby fans have certainly got every reason to be that way with Billy."