Former Manchester United player Ray Wilkins believes Radamel Falcao has not done enough to earn a permanent deal at the club - and says he looks a shadow of his former self . Falcao , on a season-long loan at Old Trafford from Monaco , has been a huge disappointment having notched just four goals in 20 appearances since moving to the Barclays Premier League . A series of poor performances have seen him left out of Louis van Gaal 's side of late and with Monaco expecting a fee for around £40million for the former Atletico Madrid striker in the summer , United face a tough decision over his future . Radamel Falcao has been a disappointment at Manchester United and it looks unlikely that they will sign him . Ray Wilkins can not see United taking up the option of signing Falcao with the way his form has been . Van Gaal seems so disappointed in the forward that he left him on the bench away at Newcastle United on Wednesday night - even when United were desperate for a goal in the closing stages . And former United midfielder Wilkins feels that Falcao 's days are numbered after failing to convince the club to invest even more money in him . 'Falcao has been struggling for goals , ' Wilkins told talkSPORT . 'He has n't shown any type of form that we expected when he arrived at Manchester United . ' Falcao chases down a ball at Old Trafford , but he has recently found himself benched by Louis van Gaal . Sunderland defender Patrick van Aanholt gets to grips with Falcao , who has struggled for form in England . The 29-year-old cost Monaco over £40m when signed a year-and-half ago from Atletico Madrid , where he forged a reputation as a goalscorer and netted a hat-trick against Chelsea in the UEFA Super Cup in 2012 . But Wilkins says he is nowhere near the standards that he showed at that game in Monaco . 'His form has been very poor in fact , we have n't seen anything like the player who absolutely destroyed Chelsea with Atletico Madrid a few years back , ' he said . 'They have already paid a huge loan fee and his wages are extremely expensive . To take him on would require a big fee , I would think they will look elsewhere . ' Falcao was at St James ' Park for United 's trip to face Newcastle United but did n't make it off the bench .
Radamel Falcao has just four goals in 1 games for Manchester United . The on-loan striker has been a huge disappointment in the Premier League . Former player Ray Wilkins does not believe United will pay up to sign him . Falcao was left on the bench for United 's 20-0 win over Newcastle United . CLICK HERE for all the latest Manchester United news .