Arsenal winger Ryo Miyaichi will be out for the rest of the season after suffering ankle ligament damage during last week's under-21 match with Reading, according to reports in Japan.
Miyaichi infamously travelled to Munich last week for Arsenal's Champions League clash with Bayern Munich, but didn't feature as a substitute after Gunners chiefs failed to recognise that the reserve stand-out was not registered for the competition.
The 21-year-old returned to action in an academy cup clash against Reading on Saturday, but was stretchered off in the last 15 minutes with yet another injury setback.
Although the youngster was unlikely to feature for the rest of the campaign the news serves as another blow to Arsene Wenger's plans, particularly with options stretched by a series of long-term absences for star players.
Theo Walcott, Aaron Ramsey and now Jack Wilshere and Mesut Ozil have all been sidelined for significant portions of the campaign, which makes Miyaichi's latest disappointment more of a blow than usual purely in terms of numbers available for first-team contention.
The Japanese youngster's chances of becoming a firm fixture at the Emirates have been ruined by injuries in recent seasons, which also effectively ended his chances of impressing on loan at Wigan Athletic last year.
Japan's latest prodigy has so far failed to live up to the promise of a wonderful spell with Feyenoord in 2011, with this latest ankle problem surely ending fleeting chances of playing for his country at this summer's World Cup.