Manchester United have had a worrying pre-season campaign so far and fans of the Old Trafford outfit will be hoping their club brings in players this week.

Jose Mourinho has seemed disgruntled during the entirety of the summer. He seems to lack belief his side can compete with their rivals and his relationship with the board seems to be at an all-time low. Perhaps, some optimism could be injected into the Portuguese manager by the way of some new talent entering Old Trafford before Thursday's transfer window deadline.

Last season will have been a disappointment for Mourinho, with the Red Devils not securing a single trophy. The January transfer deal to bring in Alexis Sanchez from Arsenal could also been seen as a disappointment, but United fans will be hoping for a much better campaign this time out.

With Liverpool and Arsenal strengthening in particular, the Red Devils need to ensure they are in the best possible shape to compete before the season begins.

With that in mind, here are three signings Mourinho could still make this week...

One of the stars of England's World Cup campaign in Russia, Harry Maguire is a talent in demand.

Although Leicester City are trying to keep hold of their star defender, United continue to trail Maguire. His confidence on the ball would make him a valuable asset to Mourinho's side, as United's defence has lacked something ever since Rio Ferdinand and Nemanja Vidic retired. Maguire will make surging runs forward, helping to overload a team setting up to defend against the Red Devils.

Maguire is valued at £31.5million by Transfermarkt.

This will be a huge deal if United can wrap up the English star.

Another player who had a fantastic World Cup and is reportedly the number one target for United this summer.

The Croatia international helped his country to a World Cup final. Despite Perisic scoring with an excellent effort against France, Croatia eventually lost 4-2 to the Blues.

The attacking midfielder is a ket part of Inter Milan's team; his skill and game intelligence would be a major benefit to United next season, and so would the goals and assists the 29-year-old could provide.

The Tottenham centre-back has been linked with United for a large portion of the summer. Man United and Tottenham have failed to reach common ground over the value of the experienced centre-back.

The Belgium international has been a key part of Tottenham's defence for many seasons, so their reluctance to see the player go is unsurprising.

This deal could still get done within the week, but Ed Woodward is going to have to splash the cash if he wants to bring Alderweireld to Old Trafford.