"He won't be ready for a number of weeks. It makes sense for everyone involved that Daniel continues his rehabilitation with Liverpool."
Clough added: "Liverpool have been tremendous to deal with throughout this process and I would like to thank Kenny Dalglish and Damien Comolli for their help and willingness to allow Daniel to come to Derby County."
Ayala had a 12-game loan loan spell at Derby's Championship rivals Hull City earlier in the season...
Source: BBC Sport