Bayern Munich youngster Jann-Fiete Arp has been diagnosed with another injury just two days after returning to full training with the Bundesliga champions.
The 19-year-old, who joined from Hamburg in July, was welcomed back to a team session at Sabener Strasse on Tuesday for the first time since having surgery on a broken left wrist in September.
However, the forward is now expected to be sidelined for a time after damaging his left forearm.
Bayern confirmed on Thursday that scans showed Arp had suffered "minor damage to the radial bone in his left forearm during training", adding that he will need to wear a cast.
The Germany youth international has yet to make a competitive senior appearance for Bayern, although he was an unused substitute for the 1-1 league draw with RB Leipzig in September and the DFL-Supercup defeat to Borussia Dortmund in August.
