The Rams boss has praised his young midfielder after he received a call up to the senior Ireland squad for the upcoming friendly against Poland in February
Hendrick was one of three Derby County players included in the Ireland squad for the friendly against Poland on February 6, with defender Richard Keogh and striker Conor Sammon also receiving call-ups.
And Rams boss Nigel Clough has praised the Dublin-born midfielder, noting that he has 'matured' as a footballer over the past few seasons.
"It has been fascinating to see the way that Jeff has developed over the last few years," Clough said. "He has grown and matured to be a very good midfield player. He is still only 20 so there is plenty of scope for him to improve even more. His form was excellent last season.
"He did have a sticky patch a few weeks ago," he continued. "But showed bags of character to rediscover his form and he has actually taken it up a notch.
"Jeff has now firmly established himself in our midfield and his performances in recent weeks have been as good as we've seen from him in a Derby shirt."
He added: "It's big news for us as a club to have three players selected in one international squad. They are all extremely good characters and their call-ups are all richly deserved."