What's the story?Manchester United right-back Aaron Wan-Bissaka has pulled out of the England squad owing to a back injury. The defender was called up by Gareth Southgate ahead of the Three Lions' fixtures against Bulgaria and Kosovo.In case you didn't know...The 21-year-old played for the England U-21s in 2018 and went on to earn three appearances. Owing to his successful performances for Crystal Palace and United, Wan-Bissaka received his first call-up to the senior national team in August.England will face Bulgaria and Kosovo as part of their Euro 2020 qualifiers, and Wan-Bissaka was initially expected to play a role on the same couple of occasions.As a new signing for the Red Devils, Wan-Bissaka has played every minute of the Premier League campaign thus far.Unfortunately, the club has endured a poor start to their new season, with their first and only victory in the Premier League coming against Chelsea on opening day. Right before the international break, United played out a 1-1 draw against Southampton.The heart of the matterAccording to the club, Wan-Bissaka has withdrawn from the England national setup due to a back injury. This news comes just a day after Paul Pogba also withdrew from the France national team due to an ankle injury.Pogba was subsequently replaced by Matteo Guendouzi, who had earlier joined the France U-21 side.The club has since confirmed that Wan-Bissaka 'has had to return to United for treatment', despite having participated in training with the rest of the squad.Unlike Pogba's case, no replacements are expected as Trent Alexander-Arnold and Kieran Trippier are other candidates for the same role.🏴󠁧󠁢󠁥󠁮󠁧󠁿 @AWBissaka has withdrawn from the @England squad due to injury. #MUFC— Manchester United (@ManUtd) September 3, 2019What's next?The Three Lions will face Bulgaria this Saturday before meeting Kosovo next Tuesday. Meanwhile, Manchester United host Leicester City at Old Trafford post international break.