A temporary grass surface has been laid over the all-weather pitch beneath but the turf is dry and patchy and not what the manager and players were expecting.
At the press conference in Minneapolis, Pellegrini said: “I think the pitch is not in a normal condition and I think it has a high risk for the players to get injured.
“I have the safety of all my players in mind regarding the possibility of injury so this will not affect my team selection. The condition also means it will be difficult to play good football.
“We played at Yankee Stadium against Liverpool and though the pitch wasn’t perfect, it was better and we had a good match. I’m sure there will be efforts to improve the pitch over the next 24 hours and I’m sure it will be watered, but there isn’t much time left.”
Pellegrini, who revealed David Silva and Samir Nasri should play a part against the Greek side tomorrow, added he is happy with the team’s overall progress during the US tour.
“I’ve been delighted with pre-season so far and I feel we have improved with each game we have played during our time in the USA,” he said.
“We have two weeks before the start of the Premier League and we are doing well. We are trying to get our team ready for the new season by giving them as many minutes on the pitch as possible as equally as we can.
“We are building towards our first game of the season and things are going really well.”
