Nigeria international Isaac Success faces a prolonged spell on the sidelines after suffering a leg injury.

Although it is unknown the exact date the Watford star will be back in action, he has returned to the United Kingdom to receive treatment, along with former Chelsea starlet Nathaniel Chalobah who is recovering from a knee injury.

''Isaac Success has returned to England from Barcelona, Spain. He was given crutches to assist him walk,'' a top source told allnigeriasoccer.com.

''No date has been fixed for his comeback, he has not started training. He is receiving treatment everyday, Chalobah and Success have appointments with the doctors every other day''.

It is a foregone conclusion that Success will not be invited for the upcoming World Cup qualifier against Algeria and the friendly with Argentina when manager Gernot Rohr announces his squad list in the next one week.

The 21-year-old has not featured for the Golden Boys in the Premier League this season.

Ifeanyi Emmanuel