straight to your inbox Alexis Sanchez has admitted that he regretted joining Manchester United after his first training session and wanted to return to Arsenal.Sanchez joined United in January 2018 in a highly publicised swap deal that saw Henrikh Mkhitaryan go to the Emirates in part exchange. Despite the sky high expectations, however, the Chilean failed to deliver at Old Trafford and only managed to score five goals in his 45 appearances for the club.