The Aston Villa winger was one of those in action during Saturday's match against Bournemouth.
Villa were hoping to pick up their first Premier League points of the season against Eddie Howe's outfit.
However, things didn't go to plan after Villa conceded two early and preventable goals.
Despite strong possession and a second half goal from new signing Douglas Luiz, Villa couldn't find their way back into the match and lost 2-1.
El Ghazi has revealed that in the aftermath Smith warned his squad that mistakes can't continue if they're to make progress in the top-flight.
As quoted by Birmingham Live, the winger said: "He said if we keep going like this we will get enough points.
“But we have to be focused and know that we cannot make mistakes anymore because this is the Premier League.
"Players are better tactically and we need to remember that."
The frustrating thing for Villa is that despite two defeats from two matches, their performances haven't been dreadful.
They could have made more of their possession and territory against the Cherries, but the signs were there they could compete at the elite Premier League level.
That was the case in the season opener against Tottenham Hotspur too.
Smith is right to encourage his players as well as warn that the silly errors can't continue. What's sure is that Smith's side badly need some points on the board to settle their early season nerves.
The Villans have some difficult tests on the horizon that will certainly test their top-flight status. Everton arrive at Villa Park next having kept ten clean sheets in their last 13 Premier League matches, with a tricky trip to Crystal Palace to follow.
Can they prove they have recruited well this season and are a viable Premier League outfit?
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