Diniz said at his pre-match press conference: "My concern is with Gabriel. We brought him here for some reasons and that it was important to him. He was one of the players, who even when we played a match below our standards against Uruguay, managed to make a positive impact in the game. It was a very difficult game but he got there and played well. He helped us sustain our position and create difficulty, sometimes even individually.
"I trust the player and he being here, I take satisfaction. He didn't come here without planning. He said he was feeling good and already doing certain things. When I talked to him he had two more weeks left. We thought it interesting to risk bringing him here. He is in good condition. We are doing things with great care.
"As soon as he arrived, he had a new MRI. We are treating him very carefully. If he does not have a condition, he will be available against Argentina. For Gabriel, it was very important for him to come here and he will return to Arsenal even better than when he got here."