The Tianjin TEDA midfielder arrived at the Eagles’ Ibom Hotels and Golf Resort camp in Uyo on Thursday, bringing the number of players in camp to 29.
“I am happy to be here. It is a huge privilege to play with this team and represent Nigeria at the World Cup,” Mikel was quoted on the Super Eagles verified Twitter handle as saying.
The Eagles will take on the Democratic Republic of Congo in a friendly game in Port Harcourt on Monday.
After the game, the team will fly out to London, where they face England on June 2.