The Arsenal midfielder trained with the rest of Roy Hodgson's 23-man squad Monday ahead of the Three Lions' World Cup clash against Uruguay on Thursday.
The Arsenal midfielder joined the 23-man squad at the Three Lions’ training camp in Urca on Monday with heavy strapping around the knee injury sustained in the friendly against Ecuador on June 4.
England manager Roy Hodgson said last week he was hopeful that Oxlade-Chamberlain would be in contention to face Uruguay in Sao Paulo, and he appeared to move freely during a series of training exercises.
There appear to be no other injury concerns for Hodgson, who held a lengthy conversation with captain Steven Gerrard at the start of the training session.
England lost its Group D opener 2-1 against Italy in Manaus on Saturday and is now preparing to face Uruguay in a game that will be pivotal to its hopes of qualifying for the second round.
"We won't panic," Hodgson said after the Italy defeat. "It was as positive performance as I have seen from us. It gives me great hope going forward, not just the next two games, but further than that because we have players here who will develop into very strong players."