Arsenal and Chelsea step up interest in record-breaking teenage sensation

Competition from outside England is also significant. Real Madrid, Barcelona, Bayern Munich, Borussia Dortmund, Inter Milan and Juventus are among the European giants believed to have monitored the youngster.

Rajkovic remains tied to Valerenga, but his rapid development means his future is likely to become a major talking point. Arsenal and Chelsea could be two of the clubs to watch if the Norwegian decides to take the next step in his career.