Manchester City are set to sign Nigerian youngsters Kelechi Iheanacho and Chidi Nwakali, Goal understands.
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Iheanacho also attracted interest from Porto but signed a pre-contract with City in January, having won the Golden Ball at the Under-17 World Cup in 2013, and has now been granted a work permit ahead of his move.
The 17-year-old plays primarily as a striker, while Nwakali – also 17 – can play as both a defender and a midfielder.
Goal revealed City's interest in Nwakali in January, and the pair are expected to join the club's training camp at St Andrews next week ahead of the their pre-season tour of America.
Manuel Pellegrini's side play Kansas City on July 23 and will then compete in the International Champions Cup, where they will face AC Milan, Liverpool and Olympiacos.