The Celtic boss has been discussing the striker and 30-year-old.
The Norwegian says Griffiths is ready to play at his best and admits he is absolutely vital to the Bhoys' hopes in the Scottish Premiership.
As such, the Celtic boss insists Griffiths will be back on track again soon.
Deila has raved about the 25-year-old's finishing ability and isn't worried about his fitness or fatigue levels. He told reporters on Friday afternoon:
RD on Leigh Griffiths:" He's not tired, that's for sure. He's ready. He gets chances all the time which is the most important thing." (MH)— Celtic Football Club (@celticfc) April 8, 2016
RD: "He is so vital for us and we know how good a finisher he is and he will get back on track again." (MH)— Celtic Football Club (@celticfc) April 8, 2016
Meanwhile, the Norwegian also discussed contract talks with Charlie Mulgrew.
But the Celtic boss admits there is nothing new to say regarding the 30-year-old, as the Bhoys are simply concentrating of finishing their league season well. There's also the small matter of a cup tie against Rangers...
After that, Deila will take other things 'as they come.'
RD on Charlie Mulgrew's contract: "Nothing new. Concentrating on finishing league well & then will take other things as they come."(MH)— Celtic Football Club (@celticfc) April 8, 2016
Celtic travel to Motherwell during Saturday's early kick-off, sitting five points clear of second-placed Aberdeen heading into the fixture.