Mikel has been out since undergoing surgery to repair a damaged knee meniscus while playing for the Blues, and there are increasing doubts back home in Nigeria about his participation at the World Cup, especially after he stayed back at Chelsea to continue treatment rather than join up with his team mates on international duty. On Monday, Nigeria sent medical officials to the London club to assess the extent of his progress and Peterside says the player will be returned fit to Nigeria. "He will join us on Friday. The doctor will officially release him to the team, fit, on that day," he told KickOffNigeria.com. Mikel will miss Nigeria's World Cup build up match against Saudi Arabia on Tuesday, but is expected to be available for the next two games against Colombia and North Korea. Goalkeepr Dele Ayenugba is the only other player yet to report to camp, following visa trouble. But Peterside says team officials are abreast with his situation and he is expected to meet up with the squad in Austria.