Man U
The Red Devils may need to bolster their squad to surpass Manchester City. Reuters

The January transfer window is in its final week, and Manchester United have yet to make a move to bolster their chances of winning the Premier League title.

Still, there is plenty of speculation surrounding the club. The Red Devils trail local rival Manchester City by three ponts with 16 matches remaining, and are coming off an impressive win over Arsenal at Emirates Stadium.

Manchester United appear to only have one legitimate target in January: Nicolas Gaitan. Numerous sources have linked the Benfica attacking midfielder to Old Trafford. The 23-year-old Argentine has a valuation of roughly £29 million, and has been linked to the Red Devils for several weeks.

Manchester City is also reportedly interested in Gaitan, and there remains a strong possibility that he stays at Benfica. Manchester United could chose to wait until the summer to pursue Gaitan, when they they have a better idea of available attacking midfielders.

But the big news this week is that Spurs star Luka Modric is still on Sir Alex Ferguson's summer wish list. The Daily Mail reported that the 26-year-old Croatian midfielder has a £50 million price tag.

Daily Mail also reported that Manchester United are in pursuit of Leandro Damiao. The 22-year-old Brazilian striker has been the subject of transfer speculation from top London clubs, and is valued at £24 million by his club, Internacional.

If Damiao isn't attainable, the Red Devils might turn their attention to Ricky van Wolfswinkel. According to Daily Mirror, the 22-year-old Sporting Lisbon striker has also been linked to Lazio and Liverpool.

According to Metro, Ajax's Jan Vertonghen has alerted Manchester United (along with Arsenal and Tottenham) that the Dutch team plan on selling him this summer. The 24-year-old centre back might be a necessary addition with the way Rio Ferdinand has struggled to stay healthy.

Meanwhile, United might be at risk of losing one of their best goal-scorers. Real Madrid are monitoring forward Danny Welbeck's contract wrangle, according to The People.