Manchester United's initial strategy for squad improvement focused on bolstering the midfield, with significant investment made over the past year in players like Carlos Baleba, Andrey Santos, and Youri Tielemans. This approach saw more than £360 million allocated to strengthening the midfield and attack, with defensive upgrades planned for the following summer.

The original plan was to address the defense in the next transfer window, coinciding with the contract situations of key players Luke Shaw, Harry Maguire, and Lisandro Martinez. Manchester United holds options to extend Maguire and Martinez's contracts by an additional year.

However, recent performances have prompted a re-evaluation of this timeline, particularly concerning the left-back position. Despite a strong showing in a recent 5-2 victory over Ipswich, which featured Bruno Fernandes' hat-trick and Marcus Rashford's return, the perceived vulnerabilities in defense, especially at left-back, remain a significant concern. Shaw, the club's longest-serving player, experienced a difficult start to the new campaign, notably being outpaced by Ipswich winger Abdul Fatawu on the opening goal.

Following the match, Shaw acknowledged his performance was not up to par and expressed his expectation of new signings to strengthen the squad. "I’m disappointed in myself," Shaw stated. "With my experience, I must be doing much better for the first goal – that’s not me."

While the club is reportedly open to signing a new left-back before the transfer window closes, any potential deal hinges on identifying the right opportunity. Director of football Jason Wilcox and the recruitment team have been aware of the need for reinforcements in this area, especially after the departure of Tyrell Malacia. Lewis Hall of Newcastle United has been a long-term target, but the asking price, reportedly over £75 million, makes a move in the current window challenging given the budget already committed to midfield acquisitions. This situation mirrors previous interest in players like Carlos Baleba, where initial high demands led to a delayed transfer.

Without immediate reinforcements, Manchester United risks entering a busy season, including Champions League fixtures, without adequate competition or cover for Shaw. The club's schedule will demand more matches than last season, making it difficult for Shaw to sustain starting every game, even if he regains form and fitness.

Alternative options considered by the club include Ferdi Kadioglu from Brighton, Ian Maatsen of Aston Villa, and Jorge Salinas of Racing Santander. A loan move for Barcelona's Alejandro Balde has also been explored, though options are limited this late in the window. Other players within the squad, such as Diogo Dalot and Noussair Mazraoui, are capable of playing on the left, and academy graduate Harry Amass served as Shaw's understudy in pre-season. Lisandro Martinez has also played at left-back, and even left-footed defensive midfielder Carlos Baleba has been mentioned as a potential makeshift option.

Should Manchester United harbor genuine title aspirations, as Shaw suggested, delaying the acquisition of a specialist left-back could be a significant gamble. The club's defensive overhaul is largely anticipated for next summer, despite concerning moments in recent matches, including conceding two set-piece goals in their opening defeat and defensive lapses in the Ipswich match.

Any further business on deadline day is expected to be minimal, potentially a replacement for Joshua Zirkzee if he returns to Italy. The primary focus, however, remains on the left-back position and whether the club will secure a new signing.