Born in Portsmouth in 1993, Oxlade-Chamberlain joined Southampton's academy aged seven, making his Saints debut aged sixteen in March 2010 as a substitute in a League One fixture against Huddersfield. The following season he scored nine goals as Southampton were promoted and in August 2011 he signed for Arsenal for an initial fee of £12 million. In his first season in the Premier League he was nominated for PFA young player of the year and was called up to England's Euro 2012 squad.

Over six seasons Oxlade-Chamberlain scored 20 goals for Arsenal in 198 appearances but with a year left on his contract stated a desire to leave in the summer of 2017. He looked set to move to Chelsea but turned it down despite the clubs agreeing a fee. He then joined Liverpool in a £35 million deal a few days before the end of the transfer window, his last appearance for Arsenal having ironically been in a 4-0 defeat against Liverpool at Anfield.

Oxlade-Chamberlain had to be patient waiting for opportunities, but by the spring of 2018 he had become an integral part of Liverpool's midfield. His season came to an end though when he suffered multiple knee ligament damage making a tackle in the first leg of the Champions League semi final with Roma. During the close season, the full extent of the injury was revealed when Jurgen Klopp announced that the it was likely to rule him out for all of the 2018-19 season, with the focus being on rehabilitation.