Nottingham Forest beat Millwall 1-0 at the City Ground after a Barry McKay debut screamer sealed them all three points.
Despite claiming the victory Warburton's men looked far from convincing and were completely dominated by Millwall for much of the game.
Luckily for Forest the visitors wasted all of their 21 shots on goal, but against better sides Forest will need to play better defensively.
In the post match interview, Warburton was quick to admit his relief after winning a difficult opening fixture. He also recognised that his side need to improve, but also moved to praise Millwall for their performance, even suggesting that the visitors deserved something form the game:
"Millwall were very good.