Jose Mourinho may have spent the most of any Premier League manager during the summer, but his Manchester United squad is far from complete.

The current standings in the Premier League table are evidence enough, with the Red Devils in sixth place - already eight points away from a Champions League spot and eleven behind pole position Chelsea.

Although he had a full summer window, Mourinho didn't cull the squad he inherited from Louis van Gaal in the way many expected, or bring in enough quality to propel his new club back to the glories of yesteryear.

So, with the January window now just one month away, it's time for the Portuguese to consider some mid-season movements in the transfer market.

And in case he's short of ideas, FootballFanCast are fortunately here to help. Here's our rundown of the FOUR players Mourinho should axe in the new year, alongside FOUR ideal replacement for each inadequate player.

Out - Marcos Rojo

Marcos Rojo certainly hasn't let himself down in recent weeks but Manchester United's only clean sheets with the Argentine in the starting XI this season have come against Zorya, Burnley and Manchester City in the League Cup.

Jose Mourinho doesn't appear particularly keen on the versatile South American, who seems not dynamic enough to be a modern day full-back and not physically imposing enough to be a centre-half, and predecessor Louis van Gaal shared a similar opinion - despite paying Sporting Lisbon £16million for his services in summer 2014.

Factor in the 26-year-old's injury problems and United are better off getting rid, especially with Chris Smalling, Eric Bailly, Phil Jones and Daley Blind ahead of him in the pecking order.

In - Virgil van Dijk

Seemingly growing in stature by the game, Virgil van Dijk's imperious form has been one of the stories of the season so far in the Premier League, with some tipping him to one day reach either side of the El Clasico rivalry.

Indeed, the Dutchman is an imposing, no-nonsense defender, combining power and pace with sheer dominance in the air - having averaged the most successful aerial duels per match, 4.4, of any Premier League defender so far this season.

But what makes the 24-year-old so appealing is his equal talent in possession. He can drive from the back with the ball at his feet, instigate attacks with ranging passes and find the net with his renowned shooting at free kicks.

United's defence lacks a figure capable of playing out of the back in the same way. But with his stock at an all-time high, Southampton won't be letting VvD leave on the cheap.

Out - Morgan Schneiderlin

Morgan Schneiderlin seems like an ideal Mourinho player on paper, as a holding midfielder who works hard, wins the ball back and keeps possession ticking over in a relatively simplistic fashion.

But he's just not convinced the Portuguese of his worth in the starting XI and has picked up just eleven minutes of Premier League action this season, courtesy of three late substitute outings against Bournemouth, Swansea and Arsenal.

The Frenchman was rated as one of the Premier League's best when he moved to Old Trafford, however, so there could still be some mid-season demand for the former Southampton man.

In - Fabinho

Fabinho's been mentioned more as a right-back option than a defensive midfield target for Manchester United in recent weeks, but it's the latter position that has seen him thrive over at AS Monaco.

Indeed, the talented Brazilian has been in phenomenal form for the French outfit, bagging five goals in 13 Ligue 1 appearances (albeit the vast majority coming from the penalty spot) whilst averaging 3.7 tackles, 1.7 interceptions and 1.2 successful dribbles per match.

Aged 23, the versatile South American is looking like a solid long-term investment at the moment and his utility would address another area of United's squad - the aforementioned right-back position. But more on that later!

Out - Memphis Depay

Few doubt Memphis Depay's natural talent but he's yet to prove capable of performing as part of a team, rather than simply being the star man, since moving to Old Trafford at the start of last season.

Louis van Gaal seemingly lost all faith in his countryman, despite regularly fielding him during his time as Oranje gaffer and forking out £25million to sign him from PSV, and he's not exactly a Mourinho player either - in fact, quite the opposite.

United need to offload whilst the rest of the footballing world is still curious of Depay. Everton manager Ronald Koeman has already expressed some interest, suggesting the Red Devils have a chance of recouping their original investment.

In - Riyad Mahrez

Riyad Mahrez may be struggling to produce the goods domestically this season in a seemingly deflated Leicester City side but the Algerian winger proved how talented he is last term, winning the PFA Player of the Year award as Claudio Ranieri's boys claimed the Premier League title.

The 2015/16 campaign saw Mahrez bag 17 goals and eleven assists in 37 appearances - which is exactly the kind of output United's wide options, such as Jesse Lingard and Anthony Martial, have failed to provide this season.

The 25-year-old has been fantastic in the Champions League this year as well, netting thrice in five outings, underlining his potential to play at a much higher level. With the Foxes already out of the title race, they might be more open to cashing in on Mahrez after showing resistance to a sale over the summer.

Out - Matteo Darmian

Another player who has proved useful in recent weeks yet appears to be operating on borrowed time. Indeed, Matteo Darmian's filled the void of his injured team-mates on either side of defence but overall, the Italy international hasn't truly met expectations since arriving at Old Trafford in summer 2015.

The Red Devils can do much better the 26-year-old and the timing is right to cut their losses, especially with a star-studded option required at right-back to overtake converted winger Antonio Valencia.

In - Alessandro Florenzi

Swapping one Italian for another, Alessandro Florenzi could be the answer to Manchester United's long-term problems on the right of defence.

The Roma star is tenacious and hardworking but possesses fantastic quality as well, evident enough last season when a thunderous long-range strike against Barcelona in the Champions League earned him a nomination for the 2015 Puskas award.

Also capable of playing on the wing or in central midfield, the 25-year-old's versatility underlines his intelligence and tactical awareness, and should appeal to Mourinho.

If there's one concern, however, its that the 24-cap international looks determined to become a one-club man at Stadio Olimpico.