 Complete the following phrase:  After rising to prominence with Southampton during the 201011 season aged 17, Oxlade-Chamberlain signed for Arsenal in August 2011. Scoring twice in his first three matches for the club, Oxlade-Chamberlain became the youngest English goalscorer in UEFA Champions League history and also claimed a regular place in the England under-21 team. Over his six seasons at the Emirates Stadium, he played 198 games and scored 20 goals, winning the FA Cup three times. He signed for Liverpool in August 2017, winning the UEFA Champions League in 2019 and the Premier League in 