Alex Oxlade-Chamberlain faces an uncertain future after his Celtic contract came to an end, but he has been working hard.
The midfielder looks unlikely to be offered an exension on the short-term deal he signed in February, after helping the club to a league and cup double.
At 32, he looks set to be on the lookout for a new club, with Celtic eyeing up Torino's Gvidas Gineitis to beef up their midfield.
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While Martin O'Neill's men are put through their paces after returning for pre-season, Oxlade-Chamberlain has been training alone as he waits for his future to be sorted out.
The former Arsenal and Liverpool star has worked with King Performance Ideology in the past and has flown out to Portugal to take part in his latest camp.
A video posted on Instagram shows him working through some fitness drills as well as doing some ball work.
Former Dundee United loanee Conor Townsend, who has just been released by promoted Ipswich, was among those part of the sessions.
