The Reds fell to a 3-1 defeat at Old Trafford on Saturday.
“Joe Gomez has done well so far in his fledgling Liverpool career but it was a poor challenge that handed United their two-goal lead… When you chase at game at Old Trafford with the crowd against you it's very difficult,” wrote Sinclair.
“Christian Benteke's goal was great but the overall performance was lacklustre and they didn't offer much going forward. They are crying out for a winger.
“The support for Benteke was a million miles away and there are a lot things Liverpool have to get right before they start climbing up the table,” he added.
Sinclair’s assessment of Benteke’s performance is a fair one and despite his spectacular strike, the Belgian international often cut an isolated figure at the front of Liverpool’s attack.
Coutinho’s guile was sorely missed and Rodgers opted to go with Danny Ings and Roberto Firmino supporting the big frontman in his absence.
Neither players are natural wide men and both failed to supply the type of balls Benteke needs to flourish.
Much was made about the 22-year old not being suited to Rodgers’ style of play following his summer switch from Villa, and the evidence so far suggests the concerns were valid.
The fact that Benteke is still getting amongst the goals is testament to his quality, but his full potential is yet to be unleashed and doesn’t look like being so without a change of approach.