Granit Xhaka was at London Colney yesterday for his first day of Arsenal training.
The former Borussia Monchengladbach had been granted extended time off after Switzerland's Euros campaign.
Fellow new signing Rob Holding also joined the likes of Santi Cazorla, Jack Wilshere and Hector Bellerin for training at London Colney on Saturday.
Holding's move from Bolton Wanderers was rubberstamped on Friday.