Middlesborough defender Omeruo missed the final warm-up against USA through an ankle injury he suffered in training prior to the match. He did some work out in the pool on Monday morning and Keshi, 52, expects him back with the rest of the squad within the week.
CSKA Moscow winger Musa has resumed full training with his team-mates after experiencing stiffness in his thigh muscle Manchester City Soccer Jersey.
Ahmed Musa has trained with us, while Omeruo should start training by Wednesday, said Keshi.
The team departs Jacksonville, USA, for Sao Paulo, Brazil, on Tuesday morning.
Iran-Nigeria opener is scheduled for 8:00pm kick-off time.