Alejandro Garnacho and Rasmus Hojlund have given Anthony Martial a problem at Manchester United

Rasmus Hojlund has been like a breath of fresh air since his arrival at Manchester United.

One of the Reds' main issues last season was their lack of an out-and-out centre forward in the team. Wout Weghorst was clearly a stop-gap and it was often pondered how well United could have been doing if they had invested in a proper striker.

Erik ten Hag reacted to the issue this summer and splashed out on Hojlund. His performances have been good enough to warrant the amount of money United spent, albeit the goals have yet to flow freely. As we enter the winter months, games are coming thick and fast for the Dane and his teammates.

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The downside of the club being relatively successful last season was the number of fixtures they were involved in, and this season could be very similar. United need to contend with Champions League and Carabao Cup matches on top of the Premier League's relentless schedule, with the FA Cup also on the horizon.

Ten Hag knows he needs to be careful not to overwork his players and Hojlund was substituted in the 63rd minute on Saturday with Anthony Martial brought on in his place. The subsequent reaction from the away following said it all.

Ten Hag justified his in-game move as an essential part of managing his squad's fitness levels, but Martial needs to do more to prove his manager can trust him. In the half an hour he spent on the field, the 27-year-old did little to threaten the Sheffield United backline.

Alejandro Garnacho was also introduced from the bench at Bramall Lane and he showed Martial what the manager is looking for from his substitutes.

Ten Hag's overhaul of the squad is a