The Celtic boss spoke to reporters about three of his star forwards.
And it's a simple one, to the mind of the Norwegian.
In so doing, though, the Celtic coach is no doubting sending a message to his striker - he wants more of the same.
Indeed, Deila attributes Guidetti's late equaliser and performance against Inter Milan to the Swedish striker training well. If he trains well, he does well, says the Bhoys boss...
RD: "'Guidetti has trained well and when you train well you get results."— Celtic Football Club (@celticfc) February 19, 2015
On that young duo, Deila is promising a big future, while he is also delighted their first two weeks at Celtic have already gone so well.
RD: "Armstrong and Mackay-Steven will give a lot to the team. It's only been two weeks but I'm delighted for them." #UEL— Celtic Football Club (@celticfc) February 19, 2015
Celtic found themselves 2-0 and 3-2 down to Roberto Mancini's Inter side but came back strong, showing heart and courage to earn themselves a 3-3 draw late on.
The Bhoys now travel to Italy knowing they still have plenty of hope - especially if they are so potent going forward at the San Siro.
Having conceded three away goals, though, Celtic will be in for another tough test. What a night in Scotland during the first leg, however...