Chelsea chief Frank Lampard is reportedly growing increasingly concerned by the seriousness of the latest injury which has ruled Christian Pulisic out of his side’s last six matches.

The America international has not featured since the New Year’s Day draw at Brighton but his head coach had hoped that a two-week winter break would provide the star with an opportunity to recover from an Achilles strain.

According to The Express, Frank had hoped Pulisic would be in contention to feature in next week’s match against top four rivals Manchester United at home but that appears to be an increasingly remote possibility.

Christian endured a difficult start to his PL career, starting on the bench more often than not, but appeared to have won Frank’s trust following his hat-trick in a 4-2 win against Burnley in October.

Three goals in his next six matches followed, but his form deteriorated thereafter and injury has now further disrupted his term.

Frank has been boosted by the return to form and fitness of winger Callum Hudson-Odoi, but the Blues boss had hoped Pulisic was on course to return and boost his attacking variants ahead of the Red Devils’ visit to west London.

The Blues were hammered 4-0 at Old Trafford on the opening weekend of the campaign but have since opened up a six point gap between Ole Gunnar Solskjaer’s inconsistent side and themselves.

Sheffield United are currently the Blues’ nearest rivals for the final Champions League qualifying place and the club will leapfrog the Blues ahead of Monday’s heavyweight showdown if the club beat struggling Brighton at home, albeit having played two matches more.