Phil Davies has resigned as Cardiff Blues' director of rugby with immediate effect, the club have confirmed.

Davies, a former Wales international, has been in charge at Blues since May 2012, and, according to an official statement, had "overseen a period of major change and development for the region." However, following defeat to bottom-place Zebre in the Pro12 on Saturday, the 50-year-old decided to quit.

"I've enjoyed the role and the leadership, processes and the high-performance elements," said Davies. "I feel this is the right time for me to look to the next challenge and other opportunities in performance development.

"It's been two years of massive change at Blues, in terms of the systems we have put in place. When I came here I was told to look at the bigger picture and make changes as a totally new group of young players came through.

"I've been delighted to see talented youngsters like Rhys Patchell, Owen Williams, Josh Navidi and Cory Allen gain international honours while the likes of Macauley Cook, Kristian Dacey and Sam Hobbs have all developed and are the building blocks for the future.

"I'm proud of the work that has gone on to put this region in a stronger position. The career pathway for players and coaches is now clear, from age grade rugby to the academy and Premiership. We have an excellent academy system and the coaches in place, with men like Dale McIntosh and Paul John, to really drive this region forward."

Davies added: "I'm sure with the squad being assembled for next season and beyond, Cardiff Blues will enjoy a bright future and I wish them every success."

Richard Holland, the Blues chief executive, said: "I've always enjoyed a strong relationship with Phil and would like to thank him for his contribution to Cardiff Blues during his tenure.

"Throughout his time at the region, Phil has worked passionately to develop the right infrastructure here and a pathway for aspiring players and coaches. He has overseen a period of massive change and I'm sure in the future we will see the benefits of his work.

"We now look to take the region forward with new leadership and, on behalf of all the staff at the Blues, I would like to wish Phil and his family every success in the future."