Despite Shaw's brilliant form, Manchester United still needs a left back

Luke Shaw was stretchered off just a few minutes into the second half of England's opening UEFA Nations League fixture against Spain. It is yet another unfortunate injury worry for the 23-year-old Manchester United left-back. What makes this incident even more sobering is the sensational form Shaw has been in.

Fresh off winning Manchester United's Player of the Month, Shaw returned to national team duty to play the most brilliant of passes for his club teammate, Marcus Rashford, to give England the lead over 2010 World Champions Spain.

However, with only one specialized left back, can Manchester United continue to rely on a fit, Luke Shaw? The 33-year-old winger turned left-back, Ashley Young, as deputy or as the main man hardly sounds ideal if United are to realistically compete.Since Shaw's arrival to Old Trafford almost 5 seasons ago he has never completed more than 16 Premier League games in a season. While all United fans are hoping he recovers and is healthy, is it sensible to expect him to burden the left back load alone? Is it time the Red Devils and Jose Mourinho consider more suitable cover/competition for the in-form Shaw?

Summer signing Diogo Dalot is capable of playing left back, but with Valencia also north of 30, Dalot seems to be United's right-sided solution to the same issue on the left.